diff --git a/lib/exception_notifiable.rb b/lib/exception_notifiable.rb
index 08c42771..d5e28fce 100644
--- a/lib/exception_notifiable.rb
+++ b/lib/exception_notifiable.rb
@@ -46,6 +46,14 @@ def exception_data(deliverer=self)
         write_inheritable_attribute(:exception_data, deliverer)
       end
     end
+
+    def exceptions_to_treat_as_404
+      exceptions = [ActiveRecord::RecordNotFound,
+                    ActionController::UnknownController,
+                    ActionController::UnknownAction]
+      exceptions << ActionController::RoutingError if ActionController.const_defined?(:RoutingError)
+      exceptions
+    end
   end
 
   private
@@ -71,7 +79,7 @@ def render_500
 
     def rescue_action_in_public(exception)
       case exception
-        when *exceptions_to_treat_as_404
+        when *self.class.exceptions_to_treat_as_404
           render_404
 
         else          
@@ -88,12 +96,4 @@ def rescue_action_in_public(exception)
             request, data)
       end
     end
-
-    def exceptions_to_treat_as_404
-      exceptions = [ActiveRecord::RecordNotFound,
-                    ActionController::UnknownController,
-                    ActionController::UnknownAction]
-      exceptions << ActionController::RoutingError if ActionController.const_defined?(:RoutingError)
-      exceptions
-    end
 end