diff --git a/fastboot/Android.mk b/fastboot/Android.mk
index 1189e1f..f339988 100644
--- a/fastboot/Android.mk
+++ b/fastboot/Android.mk
@@ -18,7 +18,7 @@
 
 LOCAL_C_INCLUDES := $(LOCAL_PATH)/../mkbootimg \
   $(LOCAL_PATH)/../../extras/ext4_utils
-LOCAL_SRC_FILES := protocol.c engine.c bootimg.c fastboot.c
+LOCAL_SRC_FILES := protocol.c engine.c bootimg.c fastboot.c util.c
 LOCAL_MODULE := fastboot
 LOCAL_MODULE_TAGS := debug
 
@@ -69,7 +69,7 @@
 
 ifeq ($(HOST_OS),linux)
 include $(CLEAR_VARS)
-LOCAL_SRC_FILES := usbtest.c usb_linux.c
+LOCAL_SRC_FILES := usbtest.c usb_linux.c util.c
 LOCAL_MODULE := usbtest
 include $(BUILD_HOST_EXECUTABLE)
 endif