diff --git a/src/text-mate-grammar.coffee b/src/text-mate-grammar.coffee
index bb520af2b..815d7ad0f 100644
--- a/src/text-mate-grammar.coffee
+++ b/src/text-mate-grammar.coffee
@@ -6,7 +6,7 @@ path = require 'path'
 {Emitter} = require 'emissary'
 {ScopeSelector} = require 'first-mate'
 
-pathSplitRegex = new RegExp("[#{path.sep}.]")
+pathSplitRegex = new RegExp("[#{"\\"+path.sep}.]")
 
 ### Internal ###