diff --git a/mm/memory.c b/mm/memory.c
index c256175..beabdef 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1139,7 +1139,7 @@
 {
 	pgd_t *pgd;
 	unsigned long next;
-	unsigned long end = addr + size;
+	unsigned long end = addr + PAGE_ALIGN(size);
 	struct mm_struct *mm = vma->vm_mm;
 	int err;