diff --git a/lib/ace/editor.js b/lib/ace/editor.js
index f85debf6..cbd0ef71 100644
--- a/lib/ace/editor.js
+++ b/lib/ace/editor.js
@@ -337,7 +337,7 @@ var Editor = function(renderer, session) {
 
     /**
      * Set a new font size (in pixels) for the editor text.
-     * @param {Number} size A font size 
+     * @param {String} size A font size ( _e.g._ "12px")
      * 
      * 
      **/