diff --git a/fs/btrfs/chunk-map.c b/fs/btrfs/chunk-map.c
index 8e3d13c..bff83e4 100644
--- a/fs/btrfs/chunk-map.c
+++ b/fs/btrfs/chunk-map.c
@@ -142,7 +142,7 @@
 	return 0;
 }
 
-int btrfs_read_chunk_tree(void)
+int __btrfs_read_chunk_tree(void)
 {
 	struct __btrfs_path path;
 	struct btrfs_key key, *found_key;