diff --git a/app/assets/javascripts/diffs/components/compare_versions_dropdown.vue b/app/assets/javascripts/diffs/components/compare_versions_dropdown.vue
index 8da02ed0b7c39c8b9e1f2a5ed896d3c3712844b3..b9b1ee026979c3731159af3988fcb83eda46d547 100644
--- a/app/assets/javascripts/diffs/components/compare_versions_dropdown.vue
+++ b/app/assets/javascripts/diffs/components/compare_versions_dropdown.vue
@@ -129,7 +129,7 @@ export default {
                 </strong>
               </div>
               <div>
-                <small class="commit-sha"> {{ version.truncated_commit_sha }} </small>
+                <small class="commit-sha"> {{ version.short_commit_sha }} </small>
               </div>
               <div>
                 <small>
diff --git a/changelogs/unreleased/sh-fix-issue-55822.yml b/changelogs/unreleased/sh-fix-issue-55822.yml
new file mode 100644
index 0000000000000000000000000000000000000000..1267b2ace2fad48818cda2297c16ffc0a7d3e5dc
--- /dev/null
+++ b/changelogs/unreleased/sh-fix-issue-55822.yml
@@ -0,0 +1,5 @@
+---
+title: Fix commit SHA not showing in merge request compare dropdown
+merge_request: 24084
+author:
+type: fixed
diff --git a/spec/features/merge_request/user_sees_versions_spec.rb b/spec/features/merge_request/user_sees_versions_spec.rb
index f7512294bef03c9ab4ba55f66916cb07a235e620..63d8decc2d2b25f01f254eba7180f11336e5b1b1 100644
--- a/spec/features/merge_request/user_sees_versions_spec.rb
+++ b/spec/features/merge_request/user_sees_versions_spec.rb
@@ -64,6 +64,17 @@ describe 'Merge request > User sees versions', :js do
       end
     end
 
+    it 'shows the commit SHAs for every version in the dropdown' do
+      page.within '.mr-version-dropdown' do
+        find('.btn-default').click
+
+        page.within('.dropdown-content') do
+          shas = merge_request.merge_request_diffs.map { |diff| Commit.truncate_sha(diff.head_commit_sha) }
+          shas.each { |sha| expect(page).to have_content(sha) }
+        end
+      end
+    end
+
     it 'shows comments that were last relevant at that version' do
       expect(page).to have_content '5 changed files'