diff --git a/mtdutils/Android.mk b/mtdutils/Android.mk
index c1b0e5b..117de78 100644
--- a/mtdutils/Android.mk
+++ b/mtdutils/Android.mk
@@ -9,6 +9,7 @@
 
 ifeq ($(TARGET_BOARD_PLATFORM),rk30xx)
 LOCAL_SRC_FILES += rk30hack.c
+LOCAL_CFLAGS += -DRK3066
 endif
 
 LOCAL_MODULE := libmtdutils
@@ -25,6 +26,7 @@
 
 ifeq ($(TARGET_BOARD_PLATFORM),rk30xx)
 LOCAL_SRC_FILES += rk30hack.c
+LOCAL_CFLAGS += -DRK3066
 endif
 
 LOCAL_MODULE := libmtdutils