diff --git a/public/language/en-GB/error.json b/public/language/en-GB/error.json
index 7a08489cb5..2c507278f3 100644
--- a/public/language/en-GB/error.json
+++ b/public/language/en-GB/error.json
@@ -158,6 +158,7 @@
 	"chat-delete-duration-expired": "You are only allowed to delete chat messages for %1 second(s) after posting",
 	"chat-deleted-already": "This chat message has already been deleted.",
 	"chat-restored-already": "This chat message has already been restored.",
+	"chat-room-does-not-exist": "Chat room does not exist.",
 
 	"already-voting-for-this-post": "You have already voted for this post.",
 	"reputation-system-disabled": "Reputation system is disabled.",