diff --git a/Source/NSTimeZone.m b/Source/NSTimeZone.m
index 13630b6a6..196bd128e 100644
--- a/Source/NSTimeZone.m
+++ b/Source/NSTimeZone.m
@@ -2971,7 +2971,7 @@ @implementation	GSTimeZone
 static TypeInfo
 getTypeInfo(NSTimeInterval since, GSTimeZone *zone)
 {
-  int64_t       when = (int64_t)since;
+  time_t        when = (time_t)since;
   gstm		tm;
   TypeInfo      type;