diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index bedfa4f..6422fe4 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -808,7 +808,7 @@
 	nodes_clear(*nodes);
 	if (maxnode == 0 || !nmask)
 		return 0;
-	if (maxnode > PAGE_SIZE)
+	if (maxnode > PAGE_SIZE*BITS_PER_BYTE)
 		return -EINVAL;
 
 	nlongs = BITS_TO_LONGS(maxnode);