diff --git a/arch/sandbox/Kconfig b/arch/sandbox/Kconfig
index 3f10709..40e0491 100644
--- a/arch/sandbox/Kconfig
+++ b/arch/sandbox/Kconfig
@@ -24,6 +24,9 @@
 	select ARCH_HAS_STACK_DUMP
 	depends on UBSAN || KASAN
 
+config PHYS_ADDR_T_64BIT
+	bool
+
 config CC_IS_64BIT
 	def_bool $(success,$(srctree)/scripts/gcc-64bitptr.sh $(CC))
 
@@ -34,6 +37,8 @@
 	bool
 	default n if SANDBOX_LINUX_I386
 	default CC_IS_64BIT
+	select ARCH_DMA_ADDR_T_64BIT
+	select PHYS_ADDR_T_64BIT
 
 config SANDBOX_LINUX_I386
 	bool "32-bit x86 barebox" if CC_HAS_LINUX_I386_SUPPORT
diff --git a/arch/sandbox/include/asm/elf.h b/arch/sandbox/include/asm/elf.h
index 3939336..e71a60a 100644
--- a/arch/sandbox/include/asm/elf.h
+++ b/arch/sandbox/include/asm/elf.h
@@ -3,7 +3,6 @@
 
 #if __SIZEOF_POINTER__ == 8
 #define ELF_CLASS	ELFCLASS64
-#define CONFIG_PHYS_ADDR_T_64BIT
 #else
 #define ELF_CLASS	ELFCLASS32
 #endif
diff --git a/arch/sandbox/include/asm/types.h b/arch/sandbox/include/asm/types.h
index 3e4a8f7..2804667 100644
--- a/arch/sandbox/include/asm/types.h
+++ b/arch/sandbox/include/asm/types.h
@@ -10,12 +10,6 @@
  */
 #define INTERNAL_SIZE_T unsigned long
 
-/*
- * This is a Kconfig variable in the Kernel, but we want to detect
- * this during compile time, so we set it here.
- */
-#define CONFIG_PHYS_ADDR_T_64BIT
-
 #endif
 
 #endif