diff --git a/contrib/postgres_fdw/postgres_fdw.c b/contrib/postgres_fdw/postgres_fdw.c
index e201b5404e..a960ada441 100644
--- a/contrib/postgres_fdw/postgres_fdw.c
+++ b/contrib/postgres_fdw/postgres_fdw.c
@@ -6857,8 +6857,13 @@ produce_tuple_asynchronously(AsyncRequest *areq, bool fetch)
 		}
 		else
 		{
-			/* There's nothing more to do; just return a NULL pointer */
-			result = NULL;
+			/*
+			 * There's nothing more to do; just check it and get an empty slot
+			 * from the child node.
+			 */
+			result = ExecProcNode((PlanState *) node);
+			Assert(TupIsNull(result));
+
 			/* Mark the request as complete */
 			ExecAsyncRequestDone(areq, result);
 		}