diff --git a/omaha_request_params.h b/omaha_request_params.h
index cdc5f38..f8e9438 100644
--- a/omaha_request_params.h
+++ b/omaha_request_params.h
@@ -105,6 +105,7 @@
   inline std::string os_build_fingerprint() const {
     return image_props_.build_fingerprint;
   }
+  inline std::string os_build_type() const { return image_props_.build_type; }
   inline std::string board_app_id() const { return image_props_.product_id; }
   inline std::string canary_app_id() const {
     return image_props_.canary_product_id;