diff --git a/app/models/announcement_setting.rb b/app/models/announcement_setting.rb
index 59b7e08..568d7cb 100644
--- a/app/models/announcement_setting.rb
+++ b/app/models/announcement_setting.rb
@@ -5,7 +5,7 @@ class AnnouncementSetting
 	field :top_limit, type: Integer, :default => 0
 
 	def self.check_limit_for_user(user_id, b_id = nil)
-		limit = self.first.top_limit
+		limit = self.first.top_limit rescue 0
 		return true if limit == 0
 		count = Bulletin.where(:is_top => true, :create_user_id => user_id, :id.ne => b_id).count
 		return count < limit