diff --git a/src/controllers/topics.js b/src/controllers/topics.js
index bc7259cb90..807e546a00 100644
--- a/src/controllers/topics.js
+++ b/src/controllers/topics.js
@@ -58,12 +58,12 @@ topicsController.get = async function getTopic(req, res, next) {
 		return helpers.notAllowed(req, res);
 	}
 
-	if (!res.locals.isAPI && (!req.params.slug || topicData.slug !== `${tid}/${req.params.slug}`) && (topicData.slug && topicData.slug !== `${tid}/`)) {
-		return helpers.redirect(res, `/topic/${topicData.slug}${postIndex ? `/${postIndex}` : ''}${generateQueryString(req.query)}`, true);
+	if (req.params.post_index === 'unread') {
+		postIndex = await topics.getUserBookmark(tid, req.uid);
 	}
 
-	if (postIndex === 'unread') {
-		postIndex = await topics.getUserBookmark(tid, req.uid);
+	if (!res.locals.isAPI && (!req.params.slug || topicData.slug !== `${tid}/${req.params.slug}`) && (topicData.slug && topicData.slug !== `${tid}/`)) {
+		return helpers.redirect(res, `/topic/${topicData.slug}${postIndex ? `/${postIndex}` : ''}${generateQueryString(req.query)}`, true);
 	}
 
 	if (utils.isNumber(postIndex) && topicData.postcount > 0 && (postIndex < 1 || postIndex > topicData.postcount)) {