diff --git a/python/ycm/completers/cs/cs_completer.py b/python/ycm/completers/cs/cs_completer.py
index 57dc073c53..3570998c26 100755
--- a/python/ycm/completers/cs/cs_completer.py
+++ b/python/ycm/completers/cs/cs_completer.py
@@ -122,7 +122,7 @@ def _StartServer( self ):
       vimsupport.PostVimMessage( SERVER_NOT_FOUND_MSG.format( omnisharp ) )
       return
 
-    if not platform.startswith('win'):
+    if not platform.startswith( 'win' ):
       omnisharp = "mono " + omnisharp
 
     solutionfile = os.path.join( folder, solutionfile )