diff --git a/src/backend/optimizer/plan/createplan.c b/src/backend/optimizer/plan/createplan.c
index 28216629aa4..0092f7d6fb2 100644
--- a/src/backend/optimizer/plan/createplan.c
+++ b/src/backend/optimizer/plan/createplan.c
@@ -4926,7 +4926,11 @@ bitmap_subplan_mark_shared(Plan *plan)
 		bitmap_subplan_mark_shared(
 								   linitial(((BitmapAnd *) plan)->bitmapplans));
 	else if (IsA(plan, BitmapOr))
+	{
 		((BitmapOr *) plan)->isshared = true;
+		bitmap_subplan_mark_shared(
+								   linitial(((BitmapOr *) plan)->bitmapplans));
+	}
 	else if (IsA(plan, BitmapIndexScan))
 		((BitmapIndexScan *) plan)->isshared = true;
 	else