diff --git a/sys/dev/firewire/fwdev.c b/sys/dev/firewire/fwdev.c
index e09ce2c947bf..cebd28ad876a 100644
--- a/sys/dev/firewire/fwdev.c
+++ b/sys/dev/firewire/fwdev.c
@@ -80,7 +80,6 @@ struct cdevsw firewire_cdevsw = {
 	.d_mmap =	fw_mmap,
 	.d_strategy =	fw_strategy,
 	.d_name =	"fw",
-	.d_flags =	D_MEM
 };
 
 struct fw_drv1 {
diff --git a/sys/i386/bios/smapi.c b/sys/i386/bios/smapi.c
index a7710bbc92bb..ef1ba426b141 100644
--- a/sys/i386/bios/smapi.c
+++ b/sys/i386/bios/smapi.c
@@ -80,7 +80,7 @@ static struct cdevsw smapi_cdevsw = {
 	.d_version =	D_VERSION,
 	.d_ioctl =	smapi_ioctl,
 	.d_name =	"smapi",
-	.d_flags =	D_MEM | D_NEEDGIANT,
+	.d_flags =	D_NEEDGIANT,
 };
 
 static void	smapi_identify(driver_t *, device_t);
diff --git a/sys/sys/conf.h b/sys/sys/conf.h
index b7d9756c3b5c..2bfc14f56e4f 100644
--- a/sys/sys/conf.h
+++ b/sys/sys/conf.h
@@ -138,7 +138,7 @@ typedef int dumper_t(
 #define	D_TAPE	0x0001
 #define	D_DISK	0x0002
 #define	D_TTY	0x0004
-#define	D_MEM	0x0008
+#define	D_MEM	0x0008	/* /dev/(k)mem */
 
 #ifdef _KERNEL