diff --git a/lib/ace/mode/dockerfile.js b/lib/ace/mode/dockerfile.js
index 732cb33a..26d546b4 100644
--- a/lib/ace/mode/dockerfile.js
+++ b/lib/ace/mode/dockerfile.js
@@ -37,6 +37,8 @@ var DockerfileHighlightRules = require("./dockerfile_highlight_rules").Dockerfil
 var CStyleFoldMode = require("./folding/cstyle").FoldMode;
 
 var Mode = function() {
+    ShMode.call(this);
+    
     this.HighlightRules = DockerfileHighlightRules;
     this.foldingRules = new CStyleFoldMode();
 };