diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 351dd3b..7ab714f 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -75,7 +75,7 @@ struct kmem_cache *btrfs_trans_handle_cachep;
 struct kmem_cache *btrfs_transaction_cachep;
 struct kmem_cache *btrfs_path_cachep;
 struct kmem_cache *btrfs_free_space_cachep;
-struct kmem_cache *btrfs_dip_cachep;
+static struct kmem_cache *btrfs_dip_cachep;
 
 #define S_SHIFT 12
 static unsigned char btrfs_type_by_mode[S_IFMT >> S_SHIFT] = {