diff --git a/lib/ace/layer/text.js b/lib/ace/layer/text.js
index 0871523a..736f112a 100644
--- a/lib/ace/layer/text.js
+++ b/lib/ace/layer/text.js
@@ -169,7 +169,7 @@ var Text = function(parentEl) {
 
                 var html = [];
                 _self.$renderLine(html, i, tokens[i-first].tokens);
-                dom.setInnerHtml(lineElement, html.join);
+                dom.setInnerHtml(lineElement, html.join(""));
             }
         });
     };