diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index 84d0912eecb2..00f9d9f911ca 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -1428,7 +1428,7 @@ static int __get_extent_inline_ref(unsigned long *ptr, struct extent_buffer *eb,
 			*out_eiref = (struct btrfs_extent_inline_ref *)(ei + 1);
 		}
 		*ptr = (unsigned long)*out_eiref;
-		if ((void *)*ptr >= (void *)ei + item_size)
+		if ((unsigned long)(*ptr) >= (unsigned long)ei + item_size)
 			return -ENOENT;
 	}