diff --git a/polygerrit-ui/app/elements/change/gr-file-list/gr-file-list.js b/polygerrit-ui/app/elements/change/gr-file-list/gr-file-list.js
index 9d2710b2..db41da0 100644
--- a/polygerrit-ui/app/elements/change/gr-file-list/gr-file-list.js
+++ b/polygerrit-ui/app/elements/change/gr-file-list/gr-file-list.js
@@ -817,7 +817,7 @@
 
     _computeFiles(filesByPath, changeComments, patchRange, reviewed, loading) {
       // Await all promises resolving from reload. @See Issue 9057
-      if (loading) { return; }
+      if (loading || !changeComments) { return; }
 
       const commentedPaths = changeComments.getPaths(patchRange);
       const files = Object.assign({}, filesByPath);