diff --git a/lib/ace/mode/markdown_highlight_rules.js b/lib/ace/mode/markdown_highlight_rules.js
index 09fcdff0..8961ff65 100644
--- a/lib/ace/mode/markdown_highlight_rules.js
+++ b/lib/ace/mode/markdown_highlight_rules.js
@@ -80,7 +80,7 @@ var MarkdownHighlightRules = function() {
                 return "markup.heading." + value.length;
             },
             regex : "^#{1,6}"
-        }, github_embed("javascript", "js-"),
+        }, github_embed("(?:javascript|js)", "js-"),
            github_embed("xml", "xml-"),
            github_embed("html", "html-"),
            github_embed("css", "css-"),