--- wine/dlls/ntdll/time.c	2004-03-12 09:58:09.000000000 +0100
+++ mywine/dlls/ntdll/time.c	2004-03-18 11:37:35.000000000 +0100
@@ -496,6 +496,7 @@
     static int last_bias;
     static int last_daylight;
     int ret;
+    char *tzenvval;
 
     RtlEnterCriticalSection( &TIME_GetBias_section );
     if(utc == last_utc)
@@ -504,6 +505,8 @@
         ret = last_bias;	
     } else
     {
+        tzenvval = getenv( "TZ");
+        if( tzenvval) unsetenv( "TZ");
         ptm = localtime(&utc);
 	*pdaylight = last_daylight =
             ptm->tm_isdst; /* daylight for local timezone */
@@ -511,6 +514,7 @@
 	ptm->tm_isdst = *pdaylight; /* use local daylight, not that of Greenwich */
 	last_utc = utc;
 	ret = last_bias = (int)(utc-mktime(ptm));
+        if( tzenvval) setenv( "TZ", tzenvval, 0);
     }
     RtlLeaveCriticalSection( &TIME_GetBias_section );
     return ret;