diff --git a/actionpack/lib/action_controller/metal/live.rb b/actionpack/lib/action_controller/metal/live.rb
index 9d628c916f..fb664a69dd 100644
--- a/actionpack/lib/action_controller/metal/live.rb
+++ b/actionpack/lib/action_controller/metal/live.rb
@@ -98,6 +98,10 @@ module ActionController
       def merge_default_headers(original, default)
         Header.new self, super
       end
+
+      def handle_conditional_get!
+        super unless committed?
+      end
     end
 
     def process(name)
diff --git a/actionpack/test/controller/live_stream_test.rb b/actionpack/test/controller/live_stream_test.rb
index 3b1a07d7af..5755444a65 100644
--- a/actionpack/test/controller/live_stream_test.rb
+++ b/actionpack/test/controller/live_stream_test.rb
@@ -48,6 +48,10 @@ module ActionController
         end
         response.stream.close
       end
+
+      def with_stale
+        render :text => 'stale' if stale?(:etag => "123")
+      end
     end
 
     tests TestController
@@ -117,5 +121,16 @@ module ActionController
       assert_equal 'zomg', response.body
       assert response.stream.closed?, 'stream should be closed'
     end
+
+    def test_stale_without_etag
+      get :with_stale
+      assert_equal 200, @response.status.to_i
+    end
+
+    def test_stale_with_etag
+      @request.if_none_match = Digest::MD5.hexdigest("123")
+      get :with_stale
+      assert_equal 304, @response.status.to_i
+    end
   end
 end