diff --git a/sys/modules/ciss/Makefile b/sys/modules/ciss/Makefile
index d82c59abec7..2ea619c5786 100644
--- a/sys/modules/ciss/Makefile
+++ b/sys/modules/ciss/Makefile
@@ -6,6 +6,6 @@ SRCS		=  ciss.c
 SRCS		+= opt_scsi.h opt_cam.h
 SRCS		+= device_if.h bus_if.h pci_if.h
 
-CFLAGS		+=-DCISS_DEBUG=0
+#CFLAGS		+=-DCISS_DEBUG
 
 .include <bsd.kmod.mk>