diff --git a/Android.mk b/Android.mk
index 5ed965e..2f2520a 100755
--- a/Android.mk
+++ b/Android.mk
@@ -398,6 +398,9 @@
 ifeq ($(TW_EXCLUDE_NANO), true)
     LOCAL_CFLAGS += -DTW_EXCLUDE_NANO
 endif
+ifneq ($(TARGET_OTA_ASSERT_DEVICE),)
+    LOCAL_CFLAGS += -DTARGET_OTA_ASSERT_DEVICE='"$(TARGET_OTA_ASSERT_DEVICE)"'
+endif
 
 LOCAL_C_INCLUDES += system/vold \