diff --git a/src/backend/distributed/executor/adaptive_executor.c b/src/backend/distributed/executor/adaptive_executor.c
index dceda90b3..b3d813ab6 100644
--- a/src/backend/distributed/executor/adaptive_executor.c
+++ b/src/backend/distributed/executor/adaptive_executor.c
@@ -3930,6 +3930,7 @@ ReceiveResults(WorkerSession *session, bool storeRows)
 		TupleDesc tupleDescriptor = tupleDest->tupleDescForQuery(tupleDest, queryIndex);
 		if (tupleDescriptor == NULL)
 		{
+			PQclear(result);
 			continue;
 		}