diff --git a/src/backend/executor/execMain.c b/src/backend/executor/execMain.c
index 2e0eef7f3de..4ea51e4e992 100644
--- a/src/backend/executor/execMain.c
+++ b/src/backend/executor/execMain.c
@@ -2555,13 +2555,15 @@ bool
 EvalPlanQualFetchRowMark(EPQState *epqstate, Index rti, TupleTableSlot *slot)
 {
 	ExecAuxRowMark *earm = epqstate->relsubs_rowmark[rti - 1];
-	ExecRowMark *erm = earm->rowmark;
+	ExecRowMark *erm;
 	Datum		datum;
 	bool		isNull;
 
 	Assert(earm != NULL);
 	Assert(epqstate->origslot != NULL);
 
+	erm = earm->rowmark;
+
 	if (RowMarkRequiresRowShareLock(erm->markType))
 		elog(ERROR, "EvalPlanQual doesn't support locking rowmarks");