diff --git a/lib/widgets/screen.js b/lib/widgets/screen.js
index c0bf9ef..c95ce1a 100644
--- a/lib/widgets/screen.js
+++ b/lib/widgets/screen.js
@@ -265,6 +265,7 @@ Screen.prototype.__defineSetter__('terminal', function(terminal) {
 Screen.prototype.setTerminal = function(terminal) {
   var entered = !!this.program.isAlt;
   if (entered) {
+    this._buf = '';
     this.program._buf = '';
     this.leave();
   }