diff --git a/src/parser.js b/src/parser.js
index 0b2b98bb..a6f133ff 100644
--- a/src/parser.js
+++ b/src/parser.js
@@ -183,7 +183,7 @@ define(['./markdown_helpers', './core'], function(MarkdownHelpers, Markdown) {
       // __foo__ is reserved and not a pattern
       if ( i.match( /^__.*__$/) )
         continue;
-      var l = i.replace( /([\\.*+?^$|()\[\]{}])/g, "\\$1" )
+      var l = i.replace( /([\/\\.*+?^$|()\[\]{}])/g, "\\$1" )
                .replace( /\n/, "\\n" );
       patterns.push( i.length === 1 ? l : "(?:" + l + ")" );
     }