diff --git a/web_src/js/features/pull-view-file.js b/web_src/js/features/pull-view-file.js
index 86b65f68cf..f68c8887bb 100644
--- a/web_src/js/features/pull-view-file.js
+++ b/web_src/js/features/pull-view-file.js
@@ -44,9 +44,11 @@ export function initViewedCheckboxListenerFor() {
       // Mark the file as viewed visually - will especially change the background
       if (this.checked) {
         form.classList.add(viewedStyleClass);
+        checkbox.setAttribute('checked', '');
         prReview.numberOfViewedFiles++;
       } else {
         form.classList.remove(viewedStyleClass);
+        checkbox.removeAttribute('checked');
         prReview.numberOfViewedFiles--;
       }