diff --git a/include/lib/cpus/aarch64/cortex_a78c.h b/include/lib/cpus/aarch64/cortex_a78c.h
index 7f7b9a5..35e543c 100644
--- a/include/lib/cpus/aarch64/cortex_a78c.h
+++ b/include/lib/cpus/aarch64/cortex_a78c.h
@@ -17,6 +17,7 @@
  * CPU Auxiliary Control register 2 specific definitions.
  * ****************************************************************************/
 #define CORTEX_A78C_CPUACTLR2_EL1			S3_0_C15_C1_1
+#define CORTEX_A78C_CPUACTLR2_EL1_BIT_0			(ULL(1) << 0)
 #define CORTEX_A78C_CPUACTLR2_EL1_BIT_40 		(ULL(1) << 40)
 
 /*******************************************************************************