diff --git a/include/plat/arm/common/plat_arm.h b/include/plat/arm/common/plat_arm.h
index 025a64f..45c099f 100644
--- a/include/plat/arm/common/plat_arm.h
+++ b/include/plat/arm/common/plat_arm.h
@@ -262,7 +262,7 @@
  * Optional functions in ARM standard platforms
  */
 void plat_arm_override_gicr_frames(const uintptr_t *plat_gicr_frames);
-int arm_get_rotpk_info(void **key_ptr, unsigned int *key_len,
+int arm_get_rotpk_info(void *cookie, void **key_ptr, unsigned int *key_len,
 	unsigned int *flags);
 int arm_get_rotpk_info_regs(void **key_ptr, unsigned int *key_len,
 	unsigned int *flags);
diff --git a/plat/arm/board/common/board_arm_trusted_boot.c b/plat/arm/board/common/board_arm_trusted_boot.c
index 3c19230..e3651f5 100644
--- a/plat/arm/board/common/board_arm_trusted_boot.c
+++ b/plat/arm/board/common/board_arm_trusted_boot.c
@@ -110,7 +110,7 @@
 /*
  * Wraper function for most Arm platforms to get ROTPK hash.
  */
-int arm_get_rotpk_info(void **key_ptr, unsigned int *key_len,
+int arm_get_rotpk_info(void *cookie, void **key_ptr, unsigned int *key_len,
 			unsigned int *flags)
 {
 #if ARM_CRYPTOCELL_INTEG
diff --git a/plat/arm/board/fvp/fvp_trusted_boot.c b/plat/arm/board/fvp/fvp_trusted_boot.c
index a09b80e..8825198 100644
--- a/plat/arm/board/fvp/fvp_trusted_boot.c
+++ b/plat/arm/board/fvp/fvp_trusted_boot.c
@@ -30,7 +30,7 @@
 int plat_get_rotpk_info(void *cookie, void **key_ptr, unsigned int *key_len,
 			unsigned int *flags)
 {
-	return arm_get_rotpk_info(key_ptr, key_len, flags);
+	return arm_get_rotpk_info(cookie, key_ptr, key_len, flags);
 }
 
 /*
diff --git a/plat/arm/board/rde1edge/rde1edge_trusted_boot.c b/plat/arm/board/rde1edge/rde1edge_trusted_boot.c
index c271f7f..4592b8f 100644
--- a/plat/arm/board/rde1edge/rde1edge_trusted_boot.c
+++ b/plat/arm/board/rde1edge/rde1edge_trusted_boot.c
@@ -22,5 +22,5 @@
 int plat_get_rotpk_info(void *cookie, void **key_ptr, unsigned int *key_len,
 			unsigned int *flags)
 {
-	return arm_get_rotpk_info(key_ptr, key_len, flags);
+	return arm_get_rotpk_info(cookie, key_ptr, key_len, flags);
 }
diff --git a/plat/arm/board/rdn1edge/rdn1edge_trusted_boot.c b/plat/arm/board/rdn1edge/rdn1edge_trusted_boot.c
index c271f7f..4592b8f 100644
--- a/plat/arm/board/rdn1edge/rdn1edge_trusted_boot.c
+++ b/plat/arm/board/rdn1edge/rdn1edge_trusted_boot.c
@@ -22,5 +22,5 @@
 int plat_get_rotpk_info(void *cookie, void **key_ptr, unsigned int *key_len,
 			unsigned int *flags)
 {
-	return arm_get_rotpk_info(key_ptr, key_len, flags);
+	return arm_get_rotpk_info(cookie, key_ptr, key_len, flags);
 }
diff --git a/plat/arm/board/sgi575/sgi575_trusted_boot.c b/plat/arm/board/sgi575/sgi575_trusted_boot.c
index c271f7f..4592b8f 100644
--- a/plat/arm/board/sgi575/sgi575_trusted_boot.c
+++ b/plat/arm/board/sgi575/sgi575_trusted_boot.c
@@ -22,5 +22,5 @@
 int plat_get_rotpk_info(void *cookie, void **key_ptr, unsigned int *key_len,
 			unsigned int *flags)
 {
-	return arm_get_rotpk_info(key_ptr, key_len, flags);
+	return arm_get_rotpk_info(cookie, key_ptr, key_len, flags);
 }
diff --git a/plat/arm/board/sgm775/sgm775_trusted_boot.c b/plat/arm/board/sgm775/sgm775_trusted_boot.c
index c271f7f..4592b8f 100644
--- a/plat/arm/board/sgm775/sgm775_trusted_boot.c
+++ b/plat/arm/board/sgm775/sgm775_trusted_boot.c
@@ -22,5 +22,5 @@
 int plat_get_rotpk_info(void *cookie, void **key_ptr, unsigned int *key_len,
 			unsigned int *flags)
 {
-	return arm_get_rotpk_info(key_ptr, key_len, flags);
+	return arm_get_rotpk_info(cookie, key_ptr, key_len, flags);
 }