diff --git a/src/xterm.js b/src/xterm.js
index 5821a2fc..69b64511 100644
--- a/src/xterm.js
+++ b/src/xterm.js
@@ -379,6 +379,8 @@
 
     Terminal.options = {};
 
+    Terminal.focus = null;
+
     each(keys(Terminal.defaults), function(key) {
       Terminal[key] = Terminal.defaults[key];
       Terminal.options[key] = Terminal.defaults[key];
@@ -413,6 +415,7 @@
       if (this.sendFocus) {
         this.send('\x1b[O');
       }
+      Terminal.focus = null;
     };
 
     /**