diff --git a/src/backend/utils/adt/selfuncs.c b/src/backend/utils/adt/selfuncs.c
index b3299b5..241f31c 100644
--- a/src/backend/utils/adt/selfuncs.c
+++ b/src/backend/utils/adt/selfuncs.c
@@ -4562,10 +4562,10 @@ get_actual_variable_range(PlannerInfo *root, VariableStatData *vardata,
 			continue;
 
 		/*
-		 * The index list might include fictitious indexes inserted by a
+		 * The index list might include hypothetical indexes inserted by a
 		 * get_relation_info hook --- don't try to access them.
 		 */
-		if (!OidIsValid(index->indexoid))
+		if (index->ishypothetical)
 			continue;
 
 		/*
diff --git a/src/include/nodes/relation.h b/src/include/nodes/relation.h
index 49ce441..ec51b34 100644
--- a/src/include/nodes/relation.h
+++ b/src/include/nodes/relation.h
@@ -469,6 +469,7 @@ typedef struct IndexOptInfo
 
 	bool		predOK;			/* true if predicate matches query */
 	bool		unique;			/* true if a unique index */
+	bool		ishypothetical;	/* true if this index does not exist in pg_index */
 	bool		amcanorderbyop;	/* does AM support order by operator result? */
 	bool		amoptionalkey;	/* can query omit key for the first column? */
 	bool		amsearchnulls;	/* can AM search for NULL/NOT NULL entries? */