diff --git a/src/backend/executor/nodeSubplan.c b/src/backend/executor/nodeSubplan.c
index c136f75ac2..1c66a93b82 100644
--- a/src/backend/executor/nodeSubplan.c
+++ b/src/backend/executor/nodeSubplan.c
@@ -456,6 +456,7 @@ ExecScanSubPlan(SubPlanState *node,
 			result = rowresult;
 			*isNull = rownull;
 		}
+		ResetExprContext(econtext);
 	}
 
 	MemoryContextSwitchTo(oldcontext);