diff --git a/app/models/user.rb b/app/models/user.rb
index 4479800..ea05989 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -131,11 +131,11 @@ class User < ApplicationRecord
   end
 
   def is_admin?
-    admin ||= if admin = Devise::LDAP::Adapter.get_ldap_param(self.cn, :admin)
-                !!admin.first
-              else
-                false
-              end
+    @admin ||= if admin = Devise::LDAP::Adapter.get_ldap_param(self.cn, :admin)
+                 !!admin.first
+               else
+                 false
+               end
   end
 
   def address