diff --git a/templates/repo/issue/sidebar/development.tmpl b/templates/repo/issue/sidebar/development.tmpl
index a1b1b96517..69fc6af4c7 100644
--- a/templates/repo/issue/sidebar/development.tmpl
+++ b/templates/repo/issue/sidebar/development.tmpl
@@ -12,7 +12,7 @@
 		{{if .PullRequest}}
 			<div class="tw-flex tw-items-center tw-overflow-hidden tw-max-w-full">
 				<span class="tw-mr-1">{{template "shared/issueicon" .PullRequest.Issue}}</span>
-				<a href="{{.PullRequest.Issue.Link}}" data-tooltip-content="{{.PullRequest.Issue.Title}}" class="item tw-overflow-hidden gt-ellipsis tw-whitespace-nowrap">
+				<a href="{{.PullRequest.Issue.Link}}" class="ref-issue item tw-overflow-hidden gt-ellipsis tw-whitespace-nowrap">
 					{{.PullRequest.Issue.Title}}
 				</a>
 			</div>
diff --git a/templates/repo/issue/view_title.tmpl b/templates/repo/issue/view_title.tmpl
index 4975796c55..e070ee27f4 100644
--- a/templates/repo/issue/view_title.tmpl
+++ b/templates/repo/issue/view_title.tmpl
@@ -134,7 +134,7 @@
 					{{ctx.Locale.TrN .Issue.NumComments "repo.issues.num_comments_1" "repo.issues.num_comments" .Issue.NumComments}}
 				</span>
 				{{if .MaybeFixed}}
-					{{$fixedStr := HTMLFormat `<a href="%s">#%d</a>` .MaybeFixed.Issue.Link .MaybeFixed.Index}}
+					{{$fixedStr := HTMLFormat `<a href="%s" class="ref-issue">#%d</a>` .MaybeFixed.Issue.Link .MaybeFixed.Index}}
 					· <span>{{ctx.Locale.Tr "repo.issues.maybefixed" $fixedStr}}</span>
 				{{end}}
 			{{end}}