From f9899881789f71cdcd667c840c708a8ff19149eb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bar=C4=B1=C5=9F=20Soner=20U=C5=9Fakl=C4=B1?=
 <baris@nodebb.org>
Date: Fri, 22 Sep 2017 10:26:03 -0400
Subject: [PATCH] closes #1668

---
 src/controllers/topics.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/controllers/topics.js b/src/controllers/topics.js
index d560fbcb2a..347ae8e847 100644
--- a/src/controllers/topics.js
+++ b/src/controllers/topics.js
@@ -293,6 +293,10 @@ function addTags(topicData, req, res) {
 			type: 'application/rss+xml',
 			href: topicData.rssFeedUrl,
 		},
+		{
+			rel: 'canonical',
+			href: nconf.get('url') + '/topic/' + topicData.slug,
+		},
 	];
 
 	if (topicData.category) {