diff --git a/src/js/views/commandViews.js b/src/js/views/commandViews.js
index fa2da865..b6ee38db 100644
--- a/src/js/views/commandViews.js
+++ b/src/js/views/commandViews.js
@@ -88,7 +88,9 @@ var CommandPromptView = Backbone.View.extend({
 
     if (e.keyCode === 9) {
       e.preventDefault();
-      el.value = shadowEl.innerHTML.replace(/ /g, ' ');
+      if (shadowEl.innerHTML) {
+        el.value = shadowEl.innerHTML.replace(/ /g, ' ');
+      }
     }
 
     this.updatePrompt(el);