option to specify usb_mass_storage device in device overlay
diff --git a/Android.mk b/Android.mk
index 57adbde..a519307 100644
--- a/Android.mk
+++ b/Android.mk
@@ -31,7 +31,7 @@
 RECOVERY_API_VERSION := 2
 LOCAL_CFLAGS += -DRECOVERY_API_VERSION=$(RECOVERY_API_VERSION)
 
-BOARD_RECOVERY_DEFINES := BOARD_HAS_NO_SELECT_BUTTON BOARD_HAS_SMALL_RECOVERY BOARD_LDPI_RECOVERY
+BOARD_RECOVERY_DEFINES := BOARD_HAS_NO_SELECT_BUTTON BOARD_HAS_SMALL_RECOVERY BOARD_LDPI_RECOVERY BOARD_UMS_LUNFILE
 
 $(foreach board_define,$(BOARD_RECOVERY_DEFINES), \
   $(if $($(board_define)), \