diff --git a/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view.js b/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view.js
index 4bfa6a9..fa31d09 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view.js
+++ b/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view.js
@@ -1212,7 +1212,7 @@
   }
 
   _computeModeSelectHideClass(_diff) {
-    return _diff.binary ? 'hide' : '';
+    return (!_diff || _diff.binary) ? 'hide' : '';
   }
 
   _onLineSelected(e, detail) {