diff --git a/src/bin/psql/tab-complete.c b/src/bin/psql/tab-complete.c
index 3bb727f05c9..96de7783e90 100644
--- a/src/bin/psql/tab-complete.c
+++ b/src/bin/psql/tab-complete.c
@@ -2046,7 +2046,7 @@ psql_completion(const char *text, int start, int end)
 	{
 		static const char *const list_DATABASE[] =
 		{"OWNER", "TEMPLATE", "ENCODING", "TABLESPACE", "CONNECTION LIMIT",
-		NULL};
+		"LC_COLLATE", "LC_CTYPE", NULL};
 
 		COMPLETE_WITH_LIST(list_DATABASE);
 	}