diff --git a/apps/threads.lua b/apps/threads.lua
index 5f8b5e8..1932594 100644
--- a/apps/threads.lua
+++ b/apps/threads.lua
@@ -145,13 +145,12 @@ app:post("thread", "/:slug", function(self)
     return {redirect_to = self:url_for("thread", {slug = thread.slug}, {page = last_page}) .. "#latest-post"}
   end
   
-  if self.params.subscribe == "on" then
-    local subscription = Subscriptions:find({user_id = user.id, thread_id = thread.id})
-    if subscription then
-      subscription:update({last_seen = os.time})
-    else
-      Subscriptions:create({user_id = user.id, thread_id = thread.id, last_seen = os.time()})
-    end
+  local subscription = Subscriptions:find({user_id = user.id, thread_id = thread.id})
+  if subscription then
+    subscription:update({last_seen = os.time})
+  end
+  if self.params.subscribe == "on" and not subscription then
+    Subscriptions:create({user_id = user.id, thread_id = thread.id, last_seen = os.time()})
   end
   
   return {redirect_to = self:url_for("thread", {slug = thread.slug}, {page = last_page}) .. "#latest-post"}