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 17aa0c4..85cf380 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
@@ -69,6 +69,7 @@
         value: true,
       },
       _prefs: Object,
+      _projectConfig: Object,
       _userPrefs: Object,
       _diffMode: {
         type: String,