diff --git a/mmcutils/Android.mk b/mmcutils/Android.mk
index 8b8b4a9..0046dc9 100644
--- a/mmcutils/Android.mk
+++ b/mmcutils/Android.mk
@@ -4,7 +4,7 @@ ifeq ($(TARGET_ARCH),arm)
 LOCAL_PATH := $(call my-dir)
 include $(CLEAR_VARS)
 
-ifneq ($BOARD_HAS_LARGE_FILESYSTEM,)
+ifeq ($(BOARD_HAS_LARGE_FILESYSTEM),true)
 LOCAL_CFLAGS += -DBOARD_HAS_LARGE_FILESYSTEM
 endif