diff --git a/drivers/arm/ccn/ccn.c b/drivers/arm/ccn/ccn.c
index 060acdd..d739c6b 100644
--- a/drivers/arm/ccn/ccn.c
+++ b/drivers/arm/ccn/ccn.c
@@ -38,7 +38,7 @@
 #include "ccn_private.h"
 
 static const ccn_desc_t *ccn_plat_desc;
-#if IMAGE_BL31
+#ifdef IMAGE_BL31
 DEFINE_BAKERY_LOCK(ccn_lock);
 #endif
 
@@ -285,7 +285,7 @@
 	assert(ccn_plat_desc);
 	assert(ccn_plat_desc->periphbase);
 
-#if IMAGE_BL31
+#ifdef IMAGE_BL31
 	bakery_lock_get(&ccn_lock);
 #endif
 	start_region_id = region_id;
@@ -305,7 +305,7 @@
 						   rn_id_map);
 	}
 
-#if IMAGE_BL31
+#ifdef IMAGE_BL31
 	bakery_lock_release(&ccn_lock);
 #endif
 }
diff --git a/include/common/aarch32/el3_common_macros.S b/include/common/aarch32/el3_common_macros.S
index dcb4edd..463a080 100644
--- a/include/common/aarch32/el3_common_macros.S
+++ b/include/common/aarch32/el3_common_macros.S
@@ -228,7 +228,7 @@
 	 * ---------------------------------------------------------------------
 	 */
 	.if \_init_c_runtime
-#if IMAGE_BL32
+#ifdef IMAGE_BL32
 		/* -----------------------------------------------------------------
 		 * Invalidate the RW memory used by the BL32 (SP_MIN) image. This
 		 * includes the data and NOBITS sections. This is done to
@@ -253,7 +253,7 @@
 		bl	zeromem
 #endif
 
-#if IMAGE_BL1
+#ifdef IMAGE_BL1
 		/* -----------------------------------------------------
 		 * Copy data from ROM to RAM.
 		 * -----------------------------------------------------
diff --git a/include/common/aarch64/el3_common_macros.S b/include/common/aarch64/el3_common_macros.S
index a418911..cbfa6ee 100644
--- a/include/common/aarch64/el3_common_macros.S
+++ b/include/common/aarch64/el3_common_macros.S
@@ -49,7 +49,7 @@
 	msr	sctlr_el3, x0
 	isb
 
-#if IMAGE_BL31
+#ifdef IMAGE_BL31
 	/* ---------------------------------------------------------------------
 	 * Initialise the per-cpu cache pointer to the CPU.
 	 * This is done early to enable crash reporting to have access to crash
@@ -235,7 +235,7 @@
 	 * ---------------------------------------------------------------------
 	 */
 	.if \_init_c_runtime
-#if IMAGE_BL31
+#ifdef IMAGE_BL31
 		/* -------------------------------------------------------------
 		 * Invalidate the RW memory used by the BL31 image. This
 		 * includes the data and NOBITS sections. This is done to
@@ -260,7 +260,7 @@
 		bl	zeromem16
 #endif
 
-#if IMAGE_BL1
+#ifdef IMAGE_BL1
 		ldr	x0, =__DATA_RAM_START__
 		ldr	x1, =__DATA_ROM_START__
 		ldr	x2, =__DATA_SIZE__
diff --git a/include/common/bl_common.h b/include/common/bl_common.h
index 5076dfd..66c20fc 100644
--- a/include/common/bl_common.h
+++ b/include/common/bl_common.h
@@ -170,13 +170,13 @@
 extern uintptr_t __RO_END__;
 #endif
 
-#if IMAGE_BL2
+#if defined(IMAGE_BL2)
 extern uintptr_t __BL2_END__;
-#elif IMAGE_BL2U
+#elif defined(IMAGE_BL2U)
 extern uintptr_t __BL2U_END__;
-#elif IMAGE_BL31
+#elif defined(IMAGE_BL31)
 extern uintptr_t __BL31_END__;
-#elif IMAGE_BL32
+#elif defined(IMAGE_BL32)
 extern uintptr_t __BL32_END__;
 #endif /* IMAGE_BLX */
 
diff --git a/include/lib/cpus/aarch32/cpu_macros.S b/include/lib/cpus/aarch32/cpu_macros.S
index 17dd258..64df236 100644
--- a/include/lib/cpus/aarch32/cpu_macros.S
+++ b/include/lib/cpus/aarch32/cpu_macros.S
@@ -51,11 +51,11 @@
 CPU_MIDR: /* cpu_ops midr */
 	.space  4
 /* Reset fn is needed during reset */
-#if IMAGE_BL1 || IMAGE_BL32
+#if defined(IMAGE_BL1) || defined(IMAGE_BL32)
 CPU_RESET_FUNC: /* cpu_ops reset_func */
 	.space  4
 #endif
-#if IMAGE_BL32 /* The power down core and cluster is needed only in BL32 */
+#ifdef IMAGE_BL32 /* The power down core and cluster is needed only in BL32 */
 CPU_PWR_DWN_OPS: /* cpu_ops power down functions */
 	.space  (4 * CPU_MAX_PWR_DWN_OPS)
 #endif
@@ -117,10 +117,10 @@
 	.align 2
 	.type cpu_ops_\_name, %object
 	.word \_midr
-#if IMAGE_BL1 || IMAGE_BL32
+#if defined(IMAGE_BL1) || defined(IMAGE_BL32)
 	.word \_resetfunc
 #endif
-#if IMAGE_BL32
+#ifdef IMAGE_BL32
 1:
 	/* Insert list of functions */
 	fill_constants CPU_MAX_PWR_DWN_OPS, \_power_down_ops
diff --git a/include/lib/cpus/aarch64/cpu_macros.S b/include/lib/cpus/aarch64/cpu_macros.S
index 570ef88..5012877 100644
--- a/include/lib/cpus/aarch64/cpu_macros.S
+++ b/include/lib/cpus/aarch64/cpu_macros.S
@@ -51,15 +51,15 @@
 CPU_MIDR: /* cpu_ops midr */
 	.space  8
 /* Reset fn is needed in BL at reset vector */
-#if IMAGE_BL1 || IMAGE_BL31
+#if defined(IMAGE_BL1) || defined(IMAGE_BL31)
 CPU_RESET_FUNC: /* cpu_ops reset_func */
 	.space  8
 #endif
-#if IMAGE_BL31 /* The power down core and cluster is needed only in BL31 */
+#ifdef IMAGE_BL31 /* The power down core and cluster is needed only in BL31 */
 CPU_PWR_DWN_OPS: /* cpu_ops power down functions */
 	.space  (8 * CPU_MAX_PWR_DWN_OPS)
 #endif
-#if (IMAGE_BL31 && CRASH_REPORTING)
+#if defined(IMAGE_BL31) && CRASH_REPORTING
 CPU_REG_DUMP: /* cpu specific register dump for crash reporting */
 	.space  8
 #endif
@@ -121,10 +121,10 @@
 	.align 3
 	.type cpu_ops_\_name, %object
 	.quad \_midr
-#if IMAGE_BL1 || IMAGE_BL31
+#if defined(IMAGE_BL1) || defined(IMAGE_BL31)
 	.quad \_resetfunc
 #endif
-#if IMAGE_BL31
+#ifdef IMAGE_BL31
 1:
 	/* Insert list of functions */
 	fill_constants CPU_MAX_PWR_DWN_OPS, \_power_down_ops
@@ -141,7 +141,7 @@
 	  .endif
 	.endif
 #endif
-#if (IMAGE_BL31 && CRASH_REPORTING)
+#if defined(IMAGE_BL31) && CRASH_REPORTING
 	.quad \_name\()_cpu_reg_dump
 #endif
 	.endm
diff --git a/include/plat/arm/board/common/board_arm_def.h b/include/plat/arm/board/common/board_arm_def.h
index ad82923..dee868f 100644
--- a/include/plat/arm/board/common/board_arm_def.h
+++ b/include/plat/arm/board/common/board_arm_def.h
@@ -39,23 +39,23 @@
  */
 
 /* Size of cacheable stacks */
-#if IMAGE_BL1
+#if defined(IMAGE_BL1)
 #if TRUSTED_BOARD_BOOT
 # define PLATFORM_STACK_SIZE 0x1000
 #else
 # define PLATFORM_STACK_SIZE 0x440
 #endif
-#elif IMAGE_BL2
+#elif defined(IMAGE_BL2)
 # if TRUSTED_BOARD_BOOT
 #  define PLATFORM_STACK_SIZE 0x1000
 # else
 #  define PLATFORM_STACK_SIZE 0x400
 # endif
-#elif IMAGE_BL2U
+#elif defined(IMAGE_BL2U)
 # define PLATFORM_STACK_SIZE 0x200
-#elif IMAGE_BL31
+#elif defined(IMAGE_BL31)
 # define PLATFORM_STACK_SIZE 0x400
-#elif IMAGE_BL32
+#elif defined(IMAGE_BL32)
 # define PLATFORM_STACK_SIZE 0x440
 #endif
 
@@ -73,7 +73,7 @@
  * Optimisation is less important for the other, transient boot images so a
  * common, maximum value is used across these images.
  */
-#if IMAGE_BL31 || IMAGE_BL32
+#if defined(IMAGE_BL31) || defined(IMAGE_BL32)
 # define PLAT_ARM_MMAP_ENTRIES		6
 # define MAX_XLAT_TABLES		4
 #else
diff --git a/include/plat/arm/common/plat_arm.h b/include/plat/arm/common/plat_arm.h
index c167aa2..e878f9e 100644
--- a/include/plat/arm/common/plat_arm.h
+++ b/include/plat/arm/common/plat_arm.h
@@ -64,7 +64,7 @@
 #endif
 );
 
-#if IMAGE_BL31
+#ifdef IMAGE_BL31
 /*
  * Use this macro to instantiate lock before it is used in below
  * arm_lock_xxx() macros
diff --git a/lib/cpus/aarch32/cpu_helpers.S b/lib/cpus/aarch32/cpu_helpers.S
index 900d158..d8cabfe 100644
--- a/lib/cpus/aarch32/cpu_helpers.S
+++ b/lib/cpus/aarch32/cpu_helpers.S
@@ -34,7 +34,7 @@
 #include <cpu_data.h>
 #include <cpu_macros.S>
 
-#if IMAGE_BL1 || IMAGE_BL32
+#if defined(IMAGE_BL1) || defined(IMAGE_BL32)
 	/*
 	 * The reset handler common to all platforms.  After a matching
 	 * cpu_ops structure entry is found, the correponding reset_handler
@@ -68,7 +68,7 @@
 
 #endif /* IMAGE_BL1 || IMAGE_BL32 */
 
-#if IMAGE_BL32 /* The power down core and cluster is needed only in  BL32 */
+#ifdef IMAGE_BL32 /* The power down core and cluster is needed only in  BL32 */
 	/*
 	 * void prepare_cpu_pwr_dwn(unsigned int power_level)
 	 *
diff --git a/lib/cpus/aarch64/cpu_helpers.S b/lib/cpus/aarch64/cpu_helpers.S
index 4f47439..7365d35 100644
--- a/lib/cpus/aarch64/cpu_helpers.S
+++ b/lib/cpus/aarch64/cpu_helpers.S
@@ -31,14 +31,14 @@
 #include <arch.h>
 #include <asm_macros.S>
 #include <assert_macros.S>
-#if IMAGE_BL31
+#ifdef IMAGE_BL31
 #include <cpu_data.h>
 #endif
 #include <cpu_macros.S>
 #include <debug.h>
 
  /* Reset fn is needed in BL at reset vector */
-#if IMAGE_BL1 || IMAGE_BL31
+#if defined(IMAGE_BL1) || defined(IMAGE_BL31)
 	/*
 	 * The reset handler common to all platforms.  After a matching
 	 * cpu_ops structure entry is found, the correponding reset_handler
@@ -72,7 +72,7 @@
 
 #endif /* IMAGE_BL1 || IMAGE_BL31 */
 
-#if IMAGE_BL31 /* The power down core and cluster is needed only in  BL31 */
+#ifdef IMAGE_BL31 /* The power down core and cluster is needed only in  BL31 */
 	/*
 	 * void prepare_cpu_pwr_dwn(unsigned int power_level)
 	 *
@@ -130,7 +130,7 @@
 endfunc init_cpu_ops
 #endif /* IMAGE_BL31 */
 
-#if IMAGE_BL31 && CRASH_REPORTING
+#if defined(IMAGE_BL31) && CRASH_REPORTING
 	/*
 	 * The cpu specific registers which need to be reported in a crash
 	 * are reported via cpu_ops cpu_reg_dump function. After a matching
diff --git a/lib/el3_runtime/aarch64/context_mgmt.c b/lib/el3_runtime/aarch64/context_mgmt.c
index 35380f3..e26950d 100644
--- a/lib/el3_runtime/aarch64/context_mgmt.c
+++ b/lib/el3_runtime/aarch64/context_mgmt.c
@@ -116,7 +116,7 @@
 	scr_el3 &= ~SCR_EA_BIT;
 #endif
 
-#if IMAGE_BL31
+#ifdef IMAGE_BL31
 	/*
 	 * IRQ/FIQ bits only need setting if interrupt routing
 	 * model has been set up for BL31.
diff --git a/plat/arm/board/common/board_css_common.c b/plat/arm/board/common/board_css_common.c
index 69b744d..3fcc6ee 100644
--- a/plat/arm/board/common/board_css_common.c
+++ b/plat/arm/board/common/board_css_common.c
@@ -35,7 +35,7 @@
  * This doesn't include Trusted SRAM as arm_setup_page_tables() already
  * takes care of mapping it.
  */
-#if IMAGE_BL1
+#ifdef IMAGE_BL1
 const mmap_region_t plat_arm_mmap[] = {
 	ARM_MAP_SHARED_RAM,
 	V2M_MAP_FLASH0_RO,
@@ -48,7 +48,7 @@
 	{0}
 };
 #endif
-#if IMAGE_BL2
+#ifdef IMAGE_BL2
 const mmap_region_t plat_arm_mmap[] = {
 	ARM_MAP_SHARED_RAM,
 	V2M_MAP_FLASH0_RO,
@@ -60,7 +60,7 @@
 	{0}
 };
 #endif
-#if IMAGE_BL2U
+#ifdef IMAGE_BL2U
 const mmap_region_t plat_arm_mmap[] = {
 	ARM_MAP_SHARED_RAM,
 	CSS_MAP_DEVICE,
@@ -68,7 +68,7 @@
 	{0}
 };
 #endif
-#if IMAGE_BL31
+#ifdef IMAGE_BL31
 const mmap_region_t plat_arm_mmap[] = {
 	ARM_MAP_SHARED_RAM,
 	V2M_MAP_IOFPGA,
@@ -77,7 +77,7 @@
 	{0}
 };
 #endif
-#if IMAGE_BL32
+#ifdef IMAGE_BL32
 const mmap_region_t plat_arm_mmap[] = {
 	V2M_MAP_IOFPGA,
 	CSS_MAP_DEVICE,
diff --git a/plat/arm/board/fvp/fvp_common.c b/plat/arm/board/fvp/fvp_common.c
index 3df472c..e201101 100644
--- a/plat/arm/board/fvp/fvp_common.c
+++ b/plat/arm/board/fvp/fvp_common.c
@@ -73,7 +73,7 @@
  * The flash needs to be mapped as writable in order to erase the FIP's Table of
  * Contents in case of unrecoverable error (see plat_error_handler()).
  */
-#if IMAGE_BL1
+#ifdef IMAGE_BL1
 const mmap_region_t plat_arm_mmap[] = {
 	ARM_MAP_SHARED_RAM,
 	V2M_MAP_FLASH0_RW,
@@ -87,7 +87,7 @@
 	{0}
 };
 #endif
-#if IMAGE_BL2
+#ifdef IMAGE_BL2
 const mmap_region_t plat_arm_mmap[] = {
 	ARM_MAP_SHARED_RAM,
 	V2M_MAP_FLASH0_RW,
@@ -103,14 +103,14 @@
 	{0}
 };
 #endif
-#if IMAGE_BL2U
+#ifdef IMAGE_BL2U
 const mmap_region_t plat_arm_mmap[] = {
 	MAP_DEVICE0,
 	V2M_MAP_IOFPGA,
 	{0}
 };
 #endif
-#if IMAGE_BL31
+#ifdef IMAGE_BL31
 const mmap_region_t plat_arm_mmap[] = {
 	ARM_MAP_SHARED_RAM,
 	V2M_MAP_IOFPGA,
@@ -119,7 +119,7 @@
 	{0}
 };
 #endif
-#if IMAGE_BL32
+#ifdef IMAGE_BL32
 const mmap_region_t plat_arm_mmap[] = {
 #ifdef AARCH32
 	ARM_MAP_SHARED_RAM,
diff --git a/plat/arm/board/juno/include/platform_def.h b/plat/arm/board/juno/include/platform_def.h
index adc4704..f89f7b4 100644
--- a/plat/arm/board/juno/include/platform_def.h
+++ b/plat/arm/board/juno/include/platform_def.h
@@ -82,27 +82,27 @@
  * PLAT_ARM_MMAP_ENTRIES depends on the number of entries in the
  * plat_arm_mmap array defined for each BL stage.
  */
-#if IMAGE_BL1
+#ifdef IMAGE_BL1
 # define PLAT_ARM_MMAP_ENTRIES		7
 # define MAX_XLAT_TABLES		4
 #endif
 
-#if IMAGE_BL2
+#ifdef IMAGE_BL2
 # define PLAT_ARM_MMAP_ENTRIES		8
 # define MAX_XLAT_TABLES		3
 #endif
 
-#if IMAGE_BL2U
+#ifdef IMAGE_BL2U
 # define PLAT_ARM_MMAP_ENTRIES		4
 # define MAX_XLAT_TABLES		3
 #endif
 
-#if IMAGE_BL31
+#ifdef IMAGE_BL31
 # define PLAT_ARM_MMAP_ENTRIES		5
 # define MAX_XLAT_TABLES		2
 #endif
 
-#if IMAGE_BL32
+#ifdef IMAGE_BL32
 # define PLAT_ARM_MMAP_ENTRIES		4
 # define MAX_XLAT_TABLES		3
 #endif
diff --git a/plat/arm/common/arm_gicv3.c b/plat/arm/common/arm_gicv3.c
index 6d68bfb..acfb3a5 100644
--- a/plat/arm/common/arm_gicv3.c
+++ b/plat/arm/common/arm_gicv3.c
@@ -79,7 +79,7 @@
 	 * can use GIC system registers to manage interrupts and does
 	 * not need GIC interface base addresses to be configured.
 	 */
-#if (AARCH32 && IMAGE_BL32) || (IMAGE_BL31 && !AARCH32)
+#if (AARCH32 && defined(IMAGE_BL32)) || (defined(IMAGE_BL31) && !AARCH32)
 	gicv3_driver_init(&arm_gic_data);
 #endif
 }
diff --git a/plat/common/plat_gicv3.c b/plat/common/plat_gicv3.c
index c961d62..3bea013 100644
--- a/plat/common/plat_gicv3.c
+++ b/plat/common/plat_gicv3.c
@@ -36,7 +36,7 @@
 #include <interrupt_mgmt.h>
 #include <platform.h>
 
-#if IMAGE_BL31
+#ifdef IMAGE_BL31
 
 /*
  * The following platform GIC functions are weakly defined. They
@@ -180,7 +180,7 @@
 	}
 }
 #endif
-#if IMAGE_BL32
+#ifdef IMAGE_BL32
 
 #pragma weak plat_ic_get_pending_interrupt_id
 #pragma weak plat_ic_acknowledge_interrupt
diff --git a/plat/mediatek/mt6795/include/platform_def.h b/plat/mediatek/mt6795/include/platform_def.h
index 275333f..16b3d39 100644
--- a/plat/mediatek/mt6795/include/platform_def.h
+++ b/plat/mediatek/mt6795/include/platform_def.h
@@ -156,13 +156,13 @@
 /* Size of cacheable stacks */
 #if DEBUG_XLAT_TABLE
 #define PLATFORM_STACK_SIZE 0x800
-#elif IMAGE_BL1
+#elif defined(IMAGE_BL1)
 #define PLATFORM_STACK_SIZE 0x440
-#elif IMAGE_BL2
+#elif defined(IMAGE_BL2)
 #define PLATFORM_STACK_SIZE 0x400
-#elif IMAGE_BL31
+#elif defined(IMAGE_BL31)
 #define PLATFORM_STACK_SIZE 0x800
-#elif IMAGE_BL32
+#elif defined(IMAGE_BL32)
 #define PLATFORM_STACK_SIZE 0x440
 #endif
 
diff --git a/plat/mediatek/mt8173/include/platform_def.h b/plat/mediatek/mt8173/include/platform_def.h
index dc5b000..8f771e3 100644
--- a/plat/mediatek/mt8173/include/platform_def.h
+++ b/plat/mediatek/mt8173/include/platform_def.h
@@ -43,13 +43,13 @@
  ******************************************************************************/
 
 /* Size of cacheable stacks */
-#if IMAGE_BL1
+#if defined(IMAGE_BL1)
 #define PLATFORM_STACK_SIZE 0x440
-#elif IMAGE_BL2
+#elif defined(IMAGE_BL2)
 #define PLATFORM_STACK_SIZE 0x400
-#elif IMAGE_BL31
+#elif defined(IMAGE_BL31)
 #define PLATFORM_STACK_SIZE 0x800
-#elif IMAGE_BL32
+#elif defined(IMAGE_BL32)
 #define PLATFORM_STACK_SIZE 0x440
 #endif
 
diff --git a/plat/nvidia/tegra/include/platform_def.h b/plat/nvidia/tegra/include/platform_def.h
index 70ddaa9..cd06d93 100644
--- a/plat/nvidia/tegra/include/platform_def.h
+++ b/plat/nvidia/tegra/include/platform_def.h
@@ -40,7 +40,7 @@
  ******************************************************************************/
 
 /* Size of cacheable stacks */
-#if IMAGE_BL31
+#ifdef IMAGE_BL31
 #define PLATFORM_STACK_SIZE 0x400
 #endif
 
diff --git a/plat/qemu/qemu_common.c b/plat/qemu/qemu_common.c
index 7ba1d34..0fe7df1 100644
--- a/plat/qemu/qemu_common.c
+++ b/plat/qemu/qemu_common.c
@@ -68,7 +68,7 @@
  * This doesn't include TZRAM as the 'mem_layout' argument passed to
  * arm_configure_mmu_elx() will give the available subset of that,
  */
-#if IMAGE_BL1
+#ifdef IMAGE_BL1
 static const mmap_region_t plat_qemu_mmap[] = {
 	MAP_FLASH0,
 	MAP_SHARED_RAM,
@@ -82,7 +82,7 @@
 	{0}
 };
 #endif
-#if IMAGE_BL2
+#ifdef IMAGE_BL2
 static const mmap_region_t plat_qemu_mmap[] = {
 	MAP_FLASH0,
 	MAP_SHARED_RAM,
@@ -98,7 +98,7 @@
 	{0}
 };
 #endif
-#if IMAGE_BL31
+#ifdef IMAGE_BL31
 static const mmap_region_t plat_qemu_mmap[] = {
 	MAP_SHARED_RAM,
 	MAP_DEVICE0,
diff --git a/plat/rockchip/common/rockchip_gicv3.c b/plat/rockchip/common/rockchip_gicv3.c
index 7730896..f3d306e 100644
--- a/plat/rockchip/common/rockchip_gicv3.c
+++ b/plat/rockchip/common/rockchip_gicv3.c
@@ -82,7 +82,7 @@
 	 * can use GIC system registers to manage interrupts and does
 	 * not need GIC interface base addresses to be configured.
 	 */
-#if IMAGE_BL31
+#ifdef IMAGE_BL31
 	gicv3_driver_init(&rockchip_gic_data);
 #endif
 }
diff --git a/plat/rockchip/rk3368/include/platform_def.h b/plat/rockchip/rk3368/include/platform_def.h
index 5d801cf..d72893c 100644
--- a/plat/rockchip/rk3368/include/platform_def.h
+++ b/plat/rockchip/rk3368/include/platform_def.h
@@ -50,13 +50,13 @@
 /* Size of cacheable stacks */
 #if DEBUG_XLAT_TABLE
 #define PLATFORM_STACK_SIZE 0x800
-#elif IMAGE_BL1
+#elif defined(IMAGE_BL1)
 #define PLATFORM_STACK_SIZE 0x440
-#elif IMAGE_BL2
+#elif defined(IMAGE_BL2)
 #define PLATFORM_STACK_SIZE 0x400
-#elif IMAGE_BL31
+#elif defined(IMAGE_BL31)
 #define PLATFORM_STACK_SIZE 0x800
-#elif IMAGE_BL32
+#elif defined(IMAGE_BL32)
 #define PLATFORM_STACK_SIZE 0x440
 #endif
 
diff --git a/plat/rockchip/rk3399/include/platform_def.h b/plat/rockchip/rk3399/include/platform_def.h
index b494824..5ccc532 100644
--- a/plat/rockchip/rk3399/include/platform_def.h
+++ b/plat/rockchip/rk3399/include/platform_def.h
@@ -50,13 +50,13 @@
 /* Size of cacheable stacks */
 #if DEBUG_XLAT_TABLE
 #define PLATFORM_STACK_SIZE 0x800
-#elif IMAGE_BL1
+#elif defined(IMAGE_BL1)
 #define PLATFORM_STACK_SIZE 0x440
-#elif IMAGE_BL2
+#elif defined(IMAGE_BL2)
 #define PLATFORM_STACK_SIZE 0x400
-#elif IMAGE_BL31
+#elif defined(IMAGE_BL31)
 #define PLATFORM_STACK_SIZE 0x800
-#elif IMAGE_BL32
+#elif defined(IMAGE_BL32)
 #define PLATFORM_STACK_SIZE 0x440
 #endif