diff --git a/app/models/forum.rb b/app/models/forum.rb
index a235a30c4..277b55dce 100644
--- a/app/models/forum.rb
+++ b/app/models/forum.rb
@@ -25,7 +25,7 @@ class Forum < ActiveRecord::Base
   def self.reset_counters!(forum_id)
     forum_id = forum_id.to_i
     update_all("topic_count = (SELECT COUNT(*) FROM #{Memo.table_name} WHERE forum_id=#{forum_id} AND parent_id IS NULL)," +
-     " memo_count = (SELECT COUNT(*) FROM #{Memo.table_name} WHERE forum_id=#{forum_id})," +
+     " memo_count = (SELECT COUNT(*) FROM #{Memo.table_name} WHERE forum_id=#{forum_id} AND parent_id IS NOT NULL)," +
      " last_memo_id = (SELECT MAX(id) FROM #{Memo.table_name} WHERE forum_id=#{forum_id})",
      ["id = ?", forum_id])
   end