diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index a90fcc2ca..82723087d 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,8 @@
+2005-01-19  Shaun Jackman  <sjackman@gmail.com>
+
+	* libc/stdlib/setenv_r.c (_setenv_r): Call tzset() if the TZ
+	environment variable is set.
+
 2005-01-19  Shaun Jackman  <sjackman@gmail.com>
 
         * tzset_r.c (_tzname): Add a comma.
diff --git a/newlib/libc/stdlib/setenv_r.c b/newlib/libc/stdlib/setenv_r.c
index f06dc6772..694bd14a9 100644
--- a/newlib/libc/stdlib/setenv_r.c
+++ b/newlib/libc/stdlib/setenv_r.c
@@ -122,7 +122,7 @@ _DEFUN (_setenv_r, (reent_ptr, name, value, rewrite),
   ENV_UNLOCK;
 
   /* if we are setting the TZ environment variable, update timezone info */
-  if (strcmp (name, "TZ") == 0)
+  if (strncmp ((*p_environ)[offset], "TZ=", 3) == 0)
     tzset ();
 
   return 0;