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application/octet-stream

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diff --git a/src/backend/executor/nodeHashjoin.c b/src/backend/executor/nodeHashjoin.c
index ec37558..6cb5229 100644
--- a/src/backend/executor/nodeHashjoin.c
+++ b/src/backend/executor/nodeHashjoin.c
@@ -454,7 +454,10 @@ ExecHashJoinImpl(PlanState *pstate, bool parallel)
 				if (joinqual == NULL || ExecQual(joinqual, econtext))
 				{
 					node->hj_MatchedOuter = true;
-					HeapTupleHeaderSetMatch(HJTUPLE_MINTUPLE(node->hj_CurTuple));
+					if (!HeapTupleHeaderHasMatch(HJTUPLE_MINTUPLE(node->hj_CurTuple)))
+					{
+						HeapTupleHeaderSetMatch(HJTUPLE_MINTUPLE(node->hj_CurTuple));
+					}
 
 					/* In an antijoin, we never return a matched tuple */
 					if (node->js.jointype == JOIN_ANTI)