diff --git a/common/runtime_svc.c b/common/runtime_svc.c
index 8729e29..337421b 100644
--- a/common/runtime_svc.c
+++ b/common/runtime_svc.c
@@ -87,7 +87,8 @@
 	int rc = 0, index, start_idx, end_idx;
 
 	/* Assert the number of descriptors detected are less than maximum indices */
-	assert((RT_SVC_DECS_NUM >= 0) && (RT_SVC_DECS_NUM < MAX_RT_SVCS));
+	assert((RT_SVC_DESCS_END >= RT_SVC_DESCS_START) &&
+			(RT_SVC_DECS_NUM < MAX_RT_SVCS));
 
 	/* If no runtime services are implemented then simply bail out */
 	if (RT_SVC_DECS_NUM == 0)