1 files changed, 3 insertions, 1 deletions
diff --git a/app/assets/javascripts/diffs/store/modules/diff_state.js b/app/assets/javascripts/diffs/store/modules/diff_state.js
index ae8930c8968..1c5c35071de 100644
--- a/app/assets/javascripts/diffs/store/modules/diff_state.js
+++ b/app/assets/javascripts/diffs/store/modules/diff_state.js
@@ -1,5 +1,6 @@
 import Cookies from 'js-cookie';
 import { getParameterValues } from '~/lib/utils/url_utility';
+import bp from '~/breakpoints';
 import { INLINE_DIFF_VIEW_TYPE, DIFF_VIEW_COOKIE_NAME, MR_TREE_SHOW_KEY } from '../../constants';
 
 const viewTypeFromQueryString = getParameterValues('view')[0];
@@ -20,6 +21,7 @@ export default () => ({
   diffViewType: viewTypeFromQueryString || viewTypeFromCookie || defaultViewType,
   tree: [],
   treeEntries: {},
-  showTreeList: storedTreeShow === null ? true : storedTreeShow === 'true',
+  showTreeList:
+    storedTreeShow === null ? bp.getBreakpointSize() !== 'xs' : storedTreeShow === 'true',
   currentDiffFileId: '',
 });