diff --git a/lib/ace/edit_session.js b/lib/ace/edit_session.js
index d06147ae..422722ba 100644
--- a/lib/ace/edit_session.js
+++ b/lib/ace/edit_session.js
@@ -49,7 +49,6 @@ var NO_CHANGE_DELTAS = {};
 
 var EditSession = function(text, mode) {
     this.$modified = true;
-    this.selection = new Selection(this);
     this.$breakpoints = [];
     this.$wrapData = [];
     this.listeners = [];
@@ -60,6 +59,7 @@ var EditSession = function(text, mode) {
         this.setDocument(new Document(text));
     }
 
+    this.selection = new Selection(this);
     if (mode)
         this.setMode(mode);
 };