diff --git a/mode/javascript/javascript.js b/mode/javascript/javascript.js
index 993d3eaf87..6d80bddf72 100644
--- a/mode/javascript/javascript.js
+++ b/mode/javascript/javascript.js
@@ -46,7 +46,6 @@ CodeMirror.defineMode("javascript", function(config, parserConfig) {
       var tsKeywords = {
         // object-like things
         "interface": kw("interface"),
-        "extends": kw("extends"),
         "constructor": kw("constructor"),
 
         // scope modifiers