diff --git a/tr_update.py b/tr_update.py
index ea9212e..b041685 100755
--- a/tr_update.py
+++ b/tr_update.py
@@ -1,7 +1,7 @@
 #!flask/bin/python
 import os
 import sys
-if sys.platform == 'wiin32':
+if sys.platform == 'win32':
     pybabel = 'flask\\Scripts\\pybabel'
 else:
     pybabel = 'flask/bin/pybabel'