diff --git a/src/backend/tcop/postgres.c b/src/backend/tcop/postgres.c
index 31ea31304b4..ba895d5854a 100644
--- a/src/backend/tcop/postgres.c
+++ b/src/backend/tcop/postgres.c
@@ -2895,7 +2895,7 @@ ProcessInterrupts(void)
 			DisableNotifyInterrupt();
 			DisableCatchupInterrupt();
 			ereport(ERROR,
-					(errcode(ERRCODE_QUERY_CANCELED),
+					(errcode(ERRCODE_LOCK_NOT_AVAILABLE),
 					 errmsg("canceling statement due to lock timeout")));
 		}
 		if (get_timeout_indicator(STATEMENT_TIMEOUT, true))