diff --git a/fs/bcachefs/btree_key_cache.c b/fs/bcachefs/btree_key_cache.c
index 549abe607b53..bfd602273e91 100644
--- a/fs/bcachefs/btree_key_cache.c
+++ b/fs/bcachefs/btree_key_cache.c
@@ -417,7 +417,7 @@ fill:
 		if (!path->locks_want &&
 		    !__bch2_btree_path_upgrade(trans, path, 1)) {
 			trace_transaction_restart_ip(trans->fn, _THIS_IP_);
-			ret = btree_trans_restart(trans, BCH_ERR_transaction_restart_upgrade);
+			ret = btree_trans_restart(trans, BCH_ERR_transaction_restart_key_cache_upgrade);
 			goto err;
 		}
 
diff --git a/fs/bcachefs/errcode.h b/fs/bcachefs/errcode.h
index 95925c8434b3..6dd2152e782e 100644
--- a/fs/bcachefs/errcode.h
+++ b/fs/bcachefs/errcode.h
@@ -22,6 +22,7 @@
 	x(transaction_restart,	transaction_restart_would_deadlock)	\
 	x(transaction_restart,	transaction_restart_would_deadlock_write)\
 	x(transaction_restart,	transaction_restart_upgrade)		\
+	x(transaction_restart,	transaction_restart_key_cache_upgrade)	\
 	x(transaction_restart,	transaction_restart_key_cache_fill)	\
 	x(transaction_restart,	transaction_restart_key_cache_raced)	\
 	x(transaction_restart,	transaction_restart_key_cache_realloced)\