diff --git a/app/models/ip_ban.rb b/app/models/ip_ban.rb
index 8d6855bdc..a6921c5e6 100644
--- a/app/models/ip_ban.rb
+++ b/app/models/ip_ban.rb
@@ -7,7 +7,7 @@ class IpBan < ActiveRecord::Base
   validates_uniqueness_of :ip_addr, :if => lambda {|rec| rec.ip_addr =~ IP_ADDR_REGEX}
   
   def self.is_banned?(ip_addr)
-    exists?("ip_addr = ?", ip_addr)
+    exists?(["ip_addr = ?", ip_addr])
   end
   
   def self.search(params)