diff --git a/appview/pages/templates/fragments/line-quote-button.html b/appview/pages/templates/fragments/line-quote-button.html
--- a/appview/pages/templates/fragments/line-quote-button.html
+++ b/appview/pages/templates/fragments/line-quote-button.html
@@ -227,7 +227,9 @@
         ? firstAnchor
         : `${firstAnchor}~${lastAnchor}`;
 
-      const md = `[\`${label}\`](${window.location.pathname}${window.location.search}#${fragment})`;
+      const linkBase = document.getElementById('round-link-base')?.value
+        || (window.location.pathname + window.location.search);
+      const md = `[\`${label}\`](${linkBase}#${fragment})`;
 
       const { selectionStart: s, selectionEnd: end, value } = ta;
       const before = value.slice(0, s);
diff --git a/appview/pages/templates/repo/pulls/pull.html b/appview/pages/templates/repo/pulls/pull.html
--- a/appview/pages/templates/repo/pulls/pull.html
+++ b/appview/pages/templates/repo/pulls/pull.html
@@ -99,6 +99,7 @@
 {{ end }}
 
 {{ define "contentAfter" }}
+  <input type="hidden" id="round-link-base" value="/{{ .RepoInfo.FullName }}/pulls/{{ .Pull.PullId }}/round/{{ .ActiveRound }}" />
   {{ template "repo/fragments/diff" (list .Diff .DiffOpts $) }}
 {{ end }}