diff --git a/src/backend/optimizer/plan/setrefs.c b/src/backend/optimizer/plan/setrefs.c
index 9f40ed77e6..7c148bfc27 100644
--- a/src/backend/optimizer/plan/setrefs.c
+++ b/src/backend/optimizer/plan/setrefs.c
@@ -756,6 +756,8 @@ set_plan_refs(PlannerInfo *root, Plan *plan, int rtoffset)
 			{
 				ResultCache *rcplan = (ResultCache *) plan;
 
+				set_upper_references(root, plan, rtoffset);
+
 				rcplan->param_exprs = fix_scan_list(root, rcplan->param_exprs,
 													rtoffset,
 													NUM_EXEC_TLIST(plan));