diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 72869ea..5712898 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5985,6 +5985,8 @@
 	unsigned long mask;
 	int i;
 
+	BUILD_BUG_ON(ARRAY_SIZE(pageflag_names) - 1 != __NR_PAGEFLAGS);
+
 	printk(KERN_ALERT "page flags: %#lx(", flags);
 
 	/* remove zone id */