diff --git a/lib/cancan/controller_resource.rb b/lib/cancan/controller_resource.rb
index 7f29d61..776dd91 100644
--- a/lib/cancan/controller_resource.rb
+++ b/lib/cancan/controller_resource.rb
@@ -6,8 +6,8 @@ module CanCan
       options = args.extract_options!
       resource_name = args.first
       before_filter_method = options.delete(:prepend) ? :prepend_before_filter : :before_filter
-      controller_class.send(before_filter_method, options.slice(:only, :except)) do |controller|
-        controller.class.cancan_resource_class.new(controller, resource_name, options.except(:only, :except)).send(method)
+      controller_class.send(before_filter_method, options.slice(:only, :except, :if, :unless)) do |controller|
+        controller.class.cancan_resource_class.new(controller, resource_name, options.except(:only, :except, :if, :unless)).send(method)
       end
     end
 
diff --git a/spec/cancan/controller_additions_spec.rb b/spec/cancan/controller_additions_spec.rb
index 2fec074..cb8af3f 100644
--- a/spec/cancan/controller_additions_spec.rb
+++ b/spec/cancan/controller_additions_spec.rb
@@ -49,14 +49,14 @@ describe CanCan::ControllerAdditions do
 
   it "authorize_resource should setup a before filter which passes call to ControllerResource" do
     stub(CanCan::ControllerResource).new(@controller, nil, :foo => :bar).mock!.authorize_resource
-    mock(@controller_class).before_filter(:except => :show) { |options, block| block.call(@controller) }
-    @controller_class.authorize_resource :foo => :bar, :except => :show
+    mock(@controller_class).before_filter(:except => :show, :if => true) { |options, block| block.call(@controller) }
+    @controller_class.authorize_resource :foo => :bar, :except => :show, :if => true
   end
 
   it "load_resource should setup a before filter which passes call to ControllerResource" do
     stub(CanCan::ControllerResource).new(@controller, nil, :foo => :bar).mock!.load_resource
-    mock(@controller_class).before_filter(:only => [:show, :index]) { |options, block| block.call(@controller) }
-    @controller_class.load_resource :foo => :bar, :only => [:show, :index]
+    mock(@controller_class).before_filter(:only => [:show, :index], :unless => false) { |options, block| block.call(@controller) }
+    @controller_class.load_resource :foo => :bar, :only => [:show, :index], :unless => false
   end
 
   it "skip_authorization_check should set up a before filter which sets @_authorized to true" do