diff --git a/buffet/http_transport_curl.h b/buffet/http_transport_curl.h
index 740adf7..17b6acc 100644
--- a/buffet/http_transport_curl.h
+++ b/buffet/http_transport_curl.h
@@ -34,7 +34,7 @@
       const HeaderList& headers,
       const std::string& user_agent,
       const std::string& referer,
-      ErrorPtr* error) override;
+      chromeos::ErrorPtr* error) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(Transport);