diff --git a/plat/arm/common/arm_ccn.c b/plat/arm/common/arm_ccn.c
index 5cb443a..fe10d7b 100644
--- a/plat/arm/common/arm_ccn.c
+++ b/plat/arm/common/arm_ccn.c
@@ -43,6 +43,9 @@
 	.master_to_rn_id_map = master_to_rn_id_map
 };
 
+CASSERT(PLAT_ARM_CLUSTER_COUNT == ARRAY_SIZE(master_to_rn_id_map),
+		assert_invalid_cluster_count_for_ccn_variant);
+
 /******************************************************************************
  * The following functions are defined as weak to allow a platform to override
  * the way ARM CCN driver is initialised and used.