diff --git a/static/js/terminal/lib/refresh.js b/static/js/terminal/lib/refresh.js
index 331a970..2d09be1 100644
--- a/static/js/terminal/lib/refresh.js
+++ b/static/js/terminal/lib/refresh.js
@@ -136,6 +136,8 @@ module.exports = function (Terminal){
               if (this.isWide(ch)) i++;
 
               out += ch;
+            } else {
+              if (data === -1)  out += ' ';
             }
             break;
         }