diff --git a/app/assets/javascripts/discourse/components/text-field.js.es6 b/app/assets/javascripts/discourse/components/text-field.js.es6
index ae26f6e99f0..6e1fabc8195 100644
--- a/app/assets/javascripts/discourse/components/text-field.js.es6
+++ b/app/assets/javascripts/discourse/components/text-field.js.es6
@@ -16,7 +16,9 @@ export default Ember.TextField.extend({
     }
   },
 
-  keyUp() {
+  keyUp(event) {
+    this._super(event);
+
     if (this.siteSettings.support_mixed_text_direction) {
       let val = this.value;
       if (isRTL(val)) {