diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 60bf8dfe7df484c77a96bf20035215b7a2997e24..0526b6c473c798fc91d650dc6b01991b2ebcd2e2 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -3963,6 +3963,7 @@ static noinline_for_stack int relocate_block_group(struct reloc_control *rc)
 restart:
 		if (update_backref_cache(trans, &rc->backref_cache)) {
 			btrfs_end_transaction(trans);
+			trans = NULL;
 			continue;
 		}