diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index e4dfda1eb7dd656f65a54320ee6af64cbb5757a9..6dba2d63f24d60dbbad443f8fda9c2f166722867 100644
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -260,6 +260,7 @@ reserve_memory (void)
 	n++;
 
 	num_rsvd_regions = n;
+	BUG_ON(IA64_MAX_RSVD_REGIONS + 1 < n);
 
 	sort_regions(rsvd_region, num_rsvd_regions);
 }