diff --git a/fs/ntfs/malloc.h b/fs/ntfs/malloc.h
index cd0be3f..a44b14c 100644
--- a/fs/ntfs/malloc.h
+++ b/fs/ntfs/malloc.h
@@ -47,7 +47,7 @@
 		return kmalloc(PAGE_SIZE, gfp_mask & ~__GFP_HIGHMEM);
 		/* return (void *)__get_free_page(gfp_mask); */
 	}
-	if (likely(size >> PAGE_SHIFT < num_physpages))
+	if (likely((size >> PAGE_SHIFT) < totalram_pages))
 		return __vmalloc(size, gfp_mask, PAGE_KERNEL);
 	return NULL;
 }