diff --git a/src/backend/distributed/planner/multi_router_planner.c b/src/backend/distributed/planner/multi_router_planner.c
index 19d386343..6e22f970f 100644
--- a/src/backend/distributed/planner/multi_router_planner.c
+++ b/src/backend/distributed/planner/multi_router_planner.c
@@ -1027,6 +1027,9 @@ ModifyQuerySupported(Query *queryTree, Query *originalQuery, bool multiShardQuer
 		}
 		else if (rangeTableEntry->rtekind == RTE_VALUES ||
 				 rangeTableEntry->rtekind == RTE_RESULT
+#if PG_VERSION_NUM >= PG_VERSION_18
+				 || rangeTableEntry->rtekind == RTE_GROUP   /* Accept synthetic GROUP */
+#endif
 				 )
 		{
 			/* do nothing, this type is supported */