diff --git a/public/language/en-GB/topic.json b/public/language/en-GB/topic.json
index 7d9878bccc..37965b4623 100644
--- a/public/language/en-GB/topic.json
+++ b/public/language/en-GB/topic.json
@@ -239,5 +239,6 @@
 	"upvote-post": "Upvote post",
 	"downvote-post": "Downvote post",
 	"post-tools": "Post tools",
-	"unread-posts-link": "Unread posts link"
+	"unread-posts-link": "Unread posts link",
+	"thumb-image": "Topic thumbnail image"
 }