diff --git a/odoo/addons/base/models/assetsbundle.py b/odoo/addons/base/models/assetsbundle.py
index b675cb294c0..43602bad89c 100644
--- a/odoo/addons/base/models/assetsbundle.py
+++ b/odoo/addons/base/models/assetsbundle.py
@@ -526,7 +526,10 @@ class AssetsBundle(object):
     def run_rtlcss(self, source):
         rtlcss = 'rtlcss'
         if os.name == 'nt':
-            rtlcss = misc.find_in_path('rtlcss.cmd')
+            try:
+                rtlcss = misc.find_in_path('rtlcss.cmd')
+            except IOError:
+                rtlcss = 'rtlcss'
         cmd = [rtlcss, '-']