diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h
index 87d1c77..0eae857 100644
--- a/arch/arm/include/asm/system.h
+++ b/arch/arm/include/asm/system.h
@@ -84,6 +84,7 @@
 #define HCR_EL2_HCD_DIS		(1 << 29) /* Hypervisor Call disabled         */
 #define HCR_EL2_AMO_EL2		(1 <<  5) /* Route SErrors to EL2             */
 
+#define ID_AA64ISAR0_EL1_RNDR	(0xFUL << 60) /* RNDR random registers */
 /*
  * ID_AA64ISAR1_EL1 bits definitions
  */