diff --git a/Android.mk b/Android.mk
index 826636f..d5e023f 100755
--- a/Android.mk
+++ b/Android.mk
@@ -240,6 +240,13 @@
 endif
 endif
 
+ifeq ($(BOARD_USES_RECOVERY_AS_BOOT), true)
+    LOCAL_CFLAGS += -DBOARD_USES_RECOVERY_AS_BOOT
+endif
+ifeq ($(BOARD_BUILD_SYSTEM_ROOT_IMAGE), true)
+    LOCAL_CFLAGS += -DBOARD_BUILD_SYSTEM_ROOT_IMAGE
+endif
+
 #TWRP Build Flags
 ifeq ($(TW_EXCLUDE_MTP),)
     LOCAL_CFLAGS += -DTW_HAS_MTP