diff --git a/src/backend/catalog/objectaddress.c b/src/backend/catalog/objectaddress.c
index ce8a4e927d..b3fdee476b 100644
--- a/src/backend/catalog/objectaddress.c
+++ b/src/backend/catalog/objectaddress.c
@@ -2612,6 +2612,13 @@ get_object_attnum_acl(Oid class_id)
 	return prop->attnum_acl;
 }
 
+/*
+ * get_object_type
+ *
+ * Return the object type associated to a given object.  This routine
+ * should be used to generate proper error messages for ACL check failures
+ * on relations.
+ */
 ObjectType
 get_object_type(Oid class_id, Oid object_id)
 {
@@ -5333,6 +5340,13 @@ strlist_to_textarray(List *list)
 	return arr;
 }
 
+/*
+ * get_relkind_objtype
+ *
+ * Return the object type equivalent to the relkind defined by the caller.
+ * This routine should be used to generate error messages for failed
+ * ACL checks on relations with details about the object type.
+ */
 ObjectType
 get_relkind_objtype(char relkind)
 {
@@ -5353,6 +5367,14 @@ get_relkind_objtype(char relkind)
 		case RELKIND_FOREIGN_TABLE:
 			return OBJECT_FOREIGN_TABLE;
 
+			/*
+			 * Toast tables are not mapped with any ObjectType enum values,
+			 * still OBJECT_TABLE is used as an equivalent here to not create
+			 * confusing error messages as handled below.
+			 */
+		case RELKIND_TOASTVALUE:
+			return OBJECT_TABLE;
+
 			/*
 			 * other relkinds are not supported here because they don't map to
 			 * OBJECT_* values
diff --git a/src/test/regress/expected/create_index.out b/src/test/regress/expected/create_index.out
index 324db1b6ae..757a4eb8e3 100644
--- a/src/test/regress/expected/create_index.out
+++ b/src/test/regress/expected/create_index.out
@@ -2308,8 +2308,17 @@ CREATE ROLE regress_reindexuser NOLOGIN;
 SET SESSION ROLE regress_reindexuser;
 REINDEX SCHEMA schema_to_reindex;
 ERROR:  must be owner of schema schema_to_reindex
+-- Permission failures with toast tables and indexes (pg_authid here)
+RESET ROLE;
+GRANT USAGE ON SCHEMA pg_toast TO regress_reindexuser;
+SET SESSION ROLE regress_reindexuser;
+REINDEX TABLE pg_toast.pg_toast_1260;
+ERROR:  must be owner of table pg_toast_1260
+REINDEX INDEX pg_toast.pg_toast_1260_index;
+ERROR:  must be owner of index pg_toast_1260_index
 -- Clean up
 RESET ROLE;
+REVOKE USAGE ON SCHEMA pg_toast FROM regress_reindexuser;
 DROP ROLE regress_reindexuser;
 DROP SCHEMA schema_to_reindex CASCADE;
 NOTICE:  drop cascades to 6 other objects
diff --git a/src/test/regress/sql/create_index.sql b/src/test/regress/sql/create_index.sql
index f96bebf410..38324a77d5 100644
--- a/src/test/regress/sql/create_index.sql
+++ b/src/test/regress/sql/create_index.sql
@@ -949,8 +949,15 @@ REINDEX SCHEMA CONCURRENTLY schema_to_reindex;
 CREATE ROLE regress_reindexuser NOLOGIN;
 SET SESSION ROLE regress_reindexuser;
 REINDEX SCHEMA schema_to_reindex;
+-- Permission failures with toast tables and indexes (pg_authid here)
+RESET ROLE;
+GRANT USAGE ON SCHEMA pg_toast TO regress_reindexuser;
+SET SESSION ROLE regress_reindexuser;
+REINDEX TABLE pg_toast.pg_toast_1260;
+REINDEX INDEX pg_toast.pg_toast_1260_index;
 
 -- Clean up
 RESET ROLE;
+REVOKE USAGE ON SCHEMA pg_toast FROM regress_reindexuser;
 DROP ROLE regress_reindexuser;
 DROP SCHEMA schema_to_reindex CASCADE;