1 files changed, 4 insertions, 2 deletions
diff --git a/app/assets/javascripts/diffs/store/mutations.js b/app/assets/javascripts/diffs/store/mutations.js
index 6bc927b9d1f..4a9df0eafcc 100644
--- a/app/assets/javascripts/diffs/store/mutations.js
+++ b/app/assets/javascripts/diffs/store/mutations.js
@@ -254,9 +254,11 @@ export default {
   [types.SET_SHOW_TREE_LIST](state, showTreeList) {
     state.showTreeList = showTreeList;
   },
-  [types.VIEW_DIFF_FILE](state, fileId) {
+  [types.SET_CURRENT_DIFF_FILE](state, fileId) {
     state.currentDiffFileId = fileId;
-    Vue.set(state.viewedDiffFileIds, fileId, true);
+  },
+  [types.SET_DIFF_FILE_VIEWED](state, { id, seen }) {
+    Vue.set(state.viewedDiffFileIds, id, seen);
   },
   [types.OPEN_DIFF_FILE_COMMENT_FORM](state, formData) {
     state.commentForms.push({