diff --git a/src/backend/executor/nodeGather.c b/src/backend/executor/nodeGather.c
index 07c62d2fea..30885e6f5c 100644
--- a/src/backend/executor/nodeGather.c
+++ b/src/backend/executor/nodeGather.c
@@ -112,7 +112,7 @@ ExecInitGather(Gather *node, EState *estate, int eflags)
 	/*
 	 * Initialize funnel slot to same tuple descriptor as outer plan.
 	 */
-	if (!ExecContextForcesOids(&gatherstate->ps, &hasoid))
+	if (!ExecContextForcesOids(outerPlanState(gatherstate), &hasoid))
 		hasoid = false;
 	tupDesc = ExecTypeFromTL(outerNode->targetlist, hasoid);
 	ExecSetSlotDescriptor(gatherstate->funnel_slot, tupDesc);
diff --git a/src/backend/executor/nodeGatherMerge.c b/src/backend/executor/nodeGatherMerge.c
index 7dd655c448..d81462e72b 100644
--- a/src/backend/executor/nodeGatherMerge.c
+++ b/src/backend/executor/nodeGatherMerge.c
@@ -155,7 +155,7 @@ ExecInitGatherMerge(GatherMerge *node, EState *estate, int eflags)
 	 * Store the tuple descriptor into gather merge state, so we can use it
 	 * while initializing the gather merge slots.
 	 */
-	if (!ExecContextForcesOids(&gm_state->ps, &hasoid))
+	if (!ExecContextForcesOids(outerPlanState(gm_state), &hasoid))
 		hasoid = false;
 	tupDesc = ExecTypeFromTL(outerNode->targetlist, hasoid);
 	gm_state->tupDesc = tupDesc;