diff --git a/src/backend/catalog/pg_inherits.c b/src/backend/catalog/pg_inherits.c
index 98bf48d1e2..6447b52854 100644
--- a/src/backend/catalog/pg_inherits.c
+++ b/src/backend/catalog/pg_inherits.c
@@ -53,7 +53,7 @@ typedef struct SeenRelsEntry
  * against possible DROPs of child relations.
  *
  * If a partition's pg_inherits row is marked "detach pending",
- * *detached_exist (if not null) is set true, otherwise it is set false.
+ * *detached_exist (if not null) is set true.
  *
  * If omit_detached is true and there is an active snapshot (not the same as
  * the catalog snapshot used to scan pg_inherits!) and a pg_inherits tuple
@@ -84,9 +84,6 @@ find_inheritance_children(Oid parentrelId, bool omit_detached,
 	if (!has_subclass(parentrelId))
 		return NIL;
 
-	if (detached_exist)
-		*detached_exist = false;
-
 	/*
 	 * Scan pg_inherits and build a working array of subclass OIDs.
 	 */
diff --git a/src/backend/partitioning/partdesc.c b/src/backend/partitioning/partdesc.c
index 12ef36a73e..2305dff407 100644
--- a/src/backend/partitioning/partdesc.c
+++ b/src/backend/partitioning/partdesc.c
@@ -131,6 +131,7 @@ RelationBuildPartitionDesc(Relation rel, bool omit_detached)
 	 * concurrently, whatever this function returns will be accurate as of
 	 * some well-defined point in time.
 	 */
+	detached_exist = false;
 	inhoids = find_inheritance_children(RelationGetRelid(rel), omit_detached,
 										NoLock, &detached_exist);
 	nparts = list_length(inhoids);