--- tclEnv.c	2007-08-07 02:04:48.000000000 -0300
+++ tclEnv.c.fixed	2010-10-22 15:43:49.953125000 -0300
@@ -257,6 +257,7 @@
 #else
     environ[index] = p;
 #endif
+    putenv(p);
 
     /*
      * Watch out for versions of putenv that copy the string (e.g. VC++).