diff --git a/src/backend/executor/execCurrent.c b/src/backend/executor/execCurrent.c
index c7f909241b..fb3cf9537c 100644
--- a/src/backend/executor/execCurrent.c
+++ b/src/backend/executor/execCurrent.c
@@ -330,7 +330,8 @@ search_plan_tree(PlanState *node, Oid table_oid,
 			{
 				ScanState  *sstate = (ScanState *) node;
 
-				if (RelationGetRelid(sstate->ss_currentRelation) == table_oid)
+				if (sstate->ss_currentRelation &&
+					RelationGetRelid(sstate->ss_currentRelation) == table_oid)
 					result = sstate;
 				break;
 			}