diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 35e9a7af10a509dc427a2bd32c9fe8b07f8328cb..dfb700efcd6bb7e021df039a8066c8779bee7223 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -37,7 +37,7 @@ extern struct kmem_cache *btrfs_transaction_cachep;
 extern struct kmem_cache *btrfs_bit_radix_cachep;
 extern struct kmem_cache *btrfs_path_cachep;
 
-#define BTRFS_MAGIC "_B3RfS_M"
+#define BTRFS_MAGIC "_B4RfS_M"
 
 #define BTRFS_MAX_LEVEL 8
 #define BTRFS_ROOT_TREE_OBJECTID 1ULL