diff --git a/fs/ufs/Makefile b/fs/ufs/Makefile
index dd39980..4d0e02b 100644
--- a/fs/ufs/Makefile
+++ b/fs/ufs/Makefile
@@ -6,3 +6,4 @@
 
 ufs-objs := balloc.o cylinder.o dir.o file.o ialloc.o inode.o \
 	    namei.o super.o symlink.o truncate.o util.o
+ccflags-$(CONFIG_UFS_DEBUG)    += -DDEBUG