diff --git a/lib/ace/autocomplete.js b/lib/ace/autocomplete.js
index c4fd7060..50154c01 100644
--- a/lib/ace/autocomplete.js
+++ b/lib/ace/autocomplete.js
@@ -39,6 +39,7 @@ var lang = require("./lib/lang");
 var snippetManager = require("./snippets").snippetManager;
 
 var Autocomplete = function() {
+    this.autoInsert = true;
     this.keyboardHandler = new HashHandler();
     this.keyboardHandler.bindKeys(this.commands);
 
@@ -248,8 +249,11 @@ var Autocomplete = function() {
 
             this.completions = new FilteredList(matches);
             this.completions.setFilter(results.prefix);
-            if (!this.completions.filtered.length)
+            var filtered = this.completions.filtered;
+            if (!filtered.length)
                 return this.detach();
+            if (this.autoInsert && filtered.length == 1)
+                return this.insertMatch(filtered[0]);
             this.openPopup(this.editor, results.prefix, keepPopupPosition);
         }.bind(this));
     };