diff --git a/Source/libgnustep-base.def b/Source/libgnustep-base.def
index 869205965..88484cec9 100644
--- a/Source/libgnustep-base.def
+++ b/Source/libgnustep-base.def
@@ -189,12 +189,11 @@ __objc_class_name_NSConcreteWindowsTask
 __objc_class_name_NSTask
 __objc_class_name_NSThread
 __objc_class_name_GSPlaceholderTimeZone
-__objc_class_name_NSConcreteAbsoluteTimeZone
-__objc_class_name_NSConcreteTimeZone
-__objc_class_name_NSConcreteTimeZoneDetail
+__objc_class_name_GSAbsTimeZone
+__objc_class_name_GSTimeZone
+__objc_class_name_GSTimeZoneDetail
 __objc_class_name_NSInternalAbbrevDict
 __objc_class_name_NSInternalAbbrevDictObjectEnumerator
-__objc_class_name_NSInternalTimeTransition
 __objc_class_name_NSLocalTimeZone
 __objc_class_name_NSTimeZone
 __objc_class_name_NSTimeZoneDetail