diff --git a/sys/dev/sound/isa/ad1816.c b/sys/dev/sound/isa/ad1816.c
index bcf071530d9..a041ba9ba7c 100644
--- a/sys/dev/sound/isa/ad1816.c
+++ b/sys/dev/sound/isa/ad1816.c
@@ -619,4 +619,8 @@ static driver_t ad1816_driver = {
 	sizeof(snddev_info),
 };
 
-DRIVER_MODULE(ad1816, isa, ad1816_driver, pcm_devclass, 0, 0);
+DRIVER_MODULE(snd_ad1816, isa, ad1816_driver, pcm_devclass, 0, 0);
+MODULE_DEPEND(snd_ad1816, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
+MODULE_VERSION(snd_ad1816, 1);
+
+
diff --git a/sys/dev/sound/isa/es1888.c b/sys/dev/sound/isa/es1888.c
index f1c32b561ff..c4e98eaed2b 100644
--- a/sys/dev/sound/isa/es1888.c
+++ b/sys/dev/sound/isa/es1888.c
@@ -170,4 +170,8 @@ static driver_t es1888_driver = {
 
 static devclass_t pcm_devclass;
 
-DRIVER_MODULE(es1888, isa, es1888_driver, pcm_devclass, 0, 0);
+DRIVER_MODULE(snd_es1888, isa, es1888_driver, pcm_devclass, 0, 0);
+MODULE_DEPEND(snd_es1888, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
+MODULE_VERSION(snd_es1888, 1);
+
+
diff --git a/sys/dev/sound/isa/ess.c b/sys/dev/sound/isa/ess.c
index 733dd65daf9..709549becef 100644
--- a/sys/dev/sound/isa/ess.c
+++ b/sys/dev/sound/isa/ess.c
@@ -867,7 +867,10 @@ static driver_t ess_driver = {
 	sizeof(snddev_info),
 };
 
-DRIVER_MODULE(ess, sbc, ess_driver, pcm_devclass, 0, 0);
+DRIVER_MODULE(snd_ess, sbc, ess_driver, pcm_devclass, 0, 0);
+MODULE_DEPEND(snd_ess, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
+MODULE_VERSION(snd_ess, 1);
+
 
 static devclass_t esscontrol_devclass;
 
@@ -924,6 +927,3 @@ static driver_t esscontrol_driver = {
 
 DRIVER_MODULE(esscontrol, isa, esscontrol_driver, esscontrol_devclass, 0, 0);
 
-
-
-
diff --git a/sys/dev/sound/isa/gusc.c b/sys/dev/sound/isa/gusc.c
index bbda98003a5..7235e167100 100644
--- a/sys/dev/sound/isa/gusc.c
+++ b/sys/dev/sound/isa/gusc.c
@@ -663,4 +663,8 @@ static driver_t gusc_driver = {
 /*
  * gusc can be attached to an isa bus.
  */
-DRIVER_MODULE(gusc, isa, gusc_driver, gusc_devclass, 0, 0);
+DRIVER_MODULE(snd_gusc, isa, gusc_driver, gusc_devclass, 0, 0);
+MODULE_DEPEND(snd_gusc, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
+MODULE_VERSION(snd_gusc, 1);
+
+
diff --git a/sys/dev/sound/isa/mss.c b/sys/dev/sound/isa/mss.c
index 938854e2408..374dc31470a 100644
--- a/sys/dev/sound/isa/mss.c
+++ b/sys/dev/sound/isa/mss.c
@@ -966,7 +966,10 @@ static driver_t mss_driver = {
 	sizeof(snddev_info),
 };
 
-DRIVER_MODULE(mss, isa, mss_driver, pcm_devclass, 0, 0);
+DRIVER_MODULE(snd_mss, isa, mss_driver, pcm_devclass, 0, 0);
+MODULE_DEPEND(snd_mss, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
+MODULE_VERSION(snd_mss, 1);
+
 
 /*
  * main irq handler for the CS423x. The OPTi931 code is
@@ -1458,7 +1461,10 @@ static driver_t pnpmss_driver = {
 	sizeof(snddev_info),
 };
 
-DRIVER_MODULE(pnpmss, isa, pnpmss_driver, pcm_devclass, 0, 0);
+DRIVER_MODULE(snd_pnpmss, isa, pnpmss_driver, pcm_devclass, 0, 0);
+MODULE_DEPEND(snd_pnpmss, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
+MODULE_VERSION(snd_pnpmss, 1);
+
 
 /*
  * the opti931 seems to miss interrupts when working in full
@@ -1597,7 +1603,10 @@ static driver_t guspcm_driver = {
 	sizeof(snddev_info),
 };
 
-DRIVER_MODULE(guspcm, gusc, guspcm_driver, pcm_devclass, 0, 0);
+DRIVER_MODULE(snd_guspcm, gusc, guspcm_driver, pcm_devclass, 0, 0);
+MODULE_DEPEND(snd_guspcm, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
+MODULE_VERSION(snd_guspcm, 1);
+
 
 static int
 mssmix_init(snd_mixer *m)
diff --git a/sys/dev/sound/isa/sb.c b/sys/dev/sound/isa/sb.c
index 1dd971d5e62..f984d5c824e 100644
--- a/sys/dev/sound/isa/sb.c
+++ b/sys/dev/sound/isa/sb.c
@@ -892,7 +892,10 @@ static driver_t sbsbc_driver = {
 	sizeof(snddev_info),
 };
 
-DRIVER_MODULE(sbsbc, sbc, sbsbc_driver, pcm_devclass, 0, 0);
+DRIVER_MODULE(snd_sb, sbc, sbsbc_driver, pcm_devclass, 0, 0);
+MODULE_DEPEND(snd_sb, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
+MODULE_VERSION(snd_sb, 1);
+
 
 
 
diff --git a/sys/dev/sound/isa/sb16.c b/sys/dev/sound/isa/sb16.c
index 1dd971d5e62..f984d5c824e 100644
--- a/sys/dev/sound/isa/sb16.c
+++ b/sys/dev/sound/isa/sb16.c
@@ -892,7 +892,10 @@ static driver_t sbsbc_driver = {
 	sizeof(snddev_info),
 };
 
-DRIVER_MODULE(sbsbc, sbc, sbsbc_driver, pcm_devclass, 0, 0);
+DRIVER_MODULE(snd_sb, sbc, sbsbc_driver, pcm_devclass, 0, 0);
+MODULE_DEPEND(snd_sb, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
+MODULE_VERSION(snd_sb, 1);
+
 
 
 
diff --git a/sys/dev/sound/isa/sb8.c b/sys/dev/sound/isa/sb8.c
index 1dd971d5e62..f984d5c824e 100644
--- a/sys/dev/sound/isa/sb8.c
+++ b/sys/dev/sound/isa/sb8.c
@@ -892,7 +892,10 @@ static driver_t sbsbc_driver = {
 	sizeof(snddev_info),
 };
 
-DRIVER_MODULE(sbsbc, sbc, sbsbc_driver, pcm_devclass, 0, 0);
+DRIVER_MODULE(snd_sb, sbc, sbsbc_driver, pcm_devclass, 0, 0);
+MODULE_DEPEND(snd_sb, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
+MODULE_VERSION(snd_sb, 1);
+
 
 
 
diff --git a/sys/dev/sound/isa/sbc.c b/sys/dev/sound/isa/sbc.c
index 2077d11991d..efec8908fa8 100644
--- a/sys/dev/sound/isa/sbc.c
+++ b/sys/dev/sound/isa/sbc.c
@@ -26,11 +26,9 @@
  * $FreeBSD$
  */
 
-#include "isa.h"
-
 #include <dev/sound/chip.h>
 #include <dev/sound/pcm/sound.h>
-#include  <dev/sound/isa/sb.h>
+#include <dev/sound/isa/sb.h>
 
 #define IO_MAX	3
 #define IRQ_MAX	1
@@ -719,4 +717,8 @@ static driver_t sbc_driver = {
 };
 
 /* sbc can be attached to an isa bus. */
-DRIVER_MODULE(sbc, isa, sbc_driver, sbc_devclass, 0, 0);
+DRIVER_MODULE(snd_sbc, isa, sbc_driver, sbc_devclass, 0, 0);
+MODULE_DEPEND(snd_sbc, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
+MODULE_VERSION(snd_sbc, 1);
+
+
diff --git a/sys/dev/sound/pci/aureal.c b/sys/dev/sound/pci/aureal.c
index c1e040d3844..e97b689aea3 100644
--- a/sys/dev/sound/pci/aureal.c
+++ b/sys/dev/sound/pci/aureal.c
@@ -686,4 +686,6 @@ static driver_t au_driver = {
 
 static devclass_t pcm_devclass;
 
-DRIVER_MODULE(au, pci, au_driver, pcm_devclass, 0, 0);
+DRIVER_MODULE(snd_aureal, pci, au_driver, pcm_devclass, 0, 0);
+MODULE_DEPEND(snd_aureal, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
+MODULE_VERSION(snd_aureal, 1);
diff --git a/sys/dev/sound/pci/csa.c b/sys/dev/sound/pci/csa.c
index f031f832c28..b4745740274 100644
--- a/sys/dev/sound/pci/csa.c
+++ b/sys/dev/sound/pci/csa.c
@@ -41,6 +41,7 @@
 #include <machine/clock.h>
 #include <sys/rman.h>
 #include <sys/soundcard.h>
+#include <dev/sound/pcm/sound.h>
 #include <dev/sound/chip.h>
 #include <dev/sound/pci/csareg.h>
 #include <dev/sound/pci/csavar.h>
@@ -796,9 +797,9 @@ csa_readcodec(csa_res *resp, u_long offset, u_int32_t *data)
 
 	/*
 	 * Read the data returned from the AC97 register.
-	 * ACSDA = Status Data Register = 474h 
+	 * ACSDA = Status Data Register = 474h
 	 */
-	*data = csa_readio(resp, BA0_ACSDA); 
+	*data = csa_readio(resp, BA0_ACSDA);
 
 	return (0);
 }
@@ -921,4 +922,6 @@ static driver_t csa_driver = {
 /*
  * csa can be attached to a pci bus.
  */
-DRIVER_MODULE(csa, pci, csa_driver, csa_devclass, 0, 0);
+DRIVER_MODULE(snd_csa, pci, csa_driver, csa_devclass, 0, 0);
+MODULE_DEPEND(snd_csa, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
+MODULE_VERSION(snd_csa, 1);
diff --git a/sys/dev/sound/pci/csapcm.c b/sys/dev/sound/pci/csapcm.c
index 8e63ee75d9b..6eb67c4562c 100644
--- a/sys/dev/sound/pci/csapcm.c
+++ b/sys/dev/sound/pci/csapcm.c
@@ -874,4 +874,7 @@ static driver_t pcmcsa_driver = {
 
 static devclass_t pcm_devclass;
 
-DRIVER_MODULE(pcmcsa, csa, pcmcsa_driver, pcm_devclass, 0, 0);
+DRIVER_MODULE(snd_csapcm, csa, pcmcsa_driver, pcm_devclass, 0, 0);
+MODULE_DEPEND(snd_csapcm, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
+MODULE_DEPEND(snd_csapcm, snd_csa, 1, 1, 1);
+MODULE_VERSION(snd_csapcm, 1);
diff --git a/sys/dev/sound/pci/ds1.c b/sys/dev/sound/pci/ds1.c
index 5fb0f07b342..61559c80e02 100644
--- a/sys/dev/sound/pci/ds1.c
+++ b/sys/dev/sound/pci/ds1.c
@@ -986,4 +986,6 @@ static driver_t ds1_driver = {
 
 static devclass_t pcm_devclass;
 
-DRIVER_MODULE(ds1, pci, ds1_driver, pcm_devclass, 0, 0);
+DRIVER_MODULE(snd_ds1, pci, ds1_driver, pcm_devclass, 0, 0);
+MODULE_DEPEND(snd_ds1, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
+MODULE_VERSION(snd_ds1, 1);
diff --git a/sys/dev/sound/pci/emu10k1.c b/sys/dev/sound/pci/emu10k1.c
index c814ada7541..e5981857c4d 100644
--- a/sys/dev/sound/pci/emu10k1.c
+++ b/sys/dev/sound/pci/emu10k1.c
@@ -1450,7 +1450,9 @@ static driver_t emu_driver = {
 
 static devclass_t pcm_devclass;
 
-DRIVER_MODULE(emu, pci, emu_driver, pcm_devclass, 0, 0);
+DRIVER_MODULE(snd_emu10k1, pci, emu_driver, pcm_devclass, 0, 0);
+MODULE_DEPEND(snd_emu10k1, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
+MODULE_VERSION(snd_emu10k1, 1);
 
 static int
 emujoy_pci_probe(device_t dev)
diff --git a/sys/dev/sound/pci/es137x.c b/sys/dev/sound/pci/es137x.c
index 3a2902355b1..0664dbc68f2 100644
--- a/sys/dev/sound/pci/es137x.c
+++ b/sys/dev/sound/pci/es137x.c
@@ -867,4 +867,6 @@ static driver_t es_driver = {
 
 static devclass_t pcm_devclass;
 
-DRIVER_MODULE(es, pci, es_driver, pcm_devclass, 0, 0);
+DRIVER_MODULE(snd_es137x, pci, es_driver, pcm_devclass, 0, 0);
+MODULE_DEPEND(snd_es137x, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
+MODULE_VERSION(snd_es137x, 1);
diff --git a/sys/dev/sound/pci/neomagic.c b/sys/dev/sound/pci/neomagic.c
index 638ac968355..f8c5ef0d969 100644
--- a/sys/dev/sound/pci/neomagic.c
+++ b/sys/dev/sound/pci/neomagic.c
@@ -695,4 +695,6 @@ static driver_t nm_driver = {
 
 static devclass_t pcm_devclass;
 
-DRIVER_MODULE(nm, pci, nm_driver, pcm_devclass, 0, 0);
+DRIVER_MODULE(snd_neomagic, pci, nm_driver, pcm_devclass, 0, 0);
+MODULE_DEPEND(snd_neomagic, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
+MODULE_VERSION(snd_neomagic, 1);
diff --git a/sys/dev/sound/pci/t4dwave.c b/sys/dev/sound/pci/t4dwave.c
index 29cf9b7bb25..01c62206ab3 100644
--- a/sys/dev/sound/pci/t4dwave.c
+++ b/sys/dev/sound/pci/t4dwave.c
@@ -698,4 +698,6 @@ static driver_t tr_driver = {
 
 static devclass_t pcm_devclass;
 
-DRIVER_MODULE(tr, pci, tr_driver, pcm_devclass, 0, 0);
+DRIVER_MODULE(snd_t4dwave, pci, tr_driver, pcm_devclass, 0, 0);
+MODULE_DEPEND(snd_t4dwave, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
+MODULE_VERSION(snd_t4dwave, 1);
diff --git a/sys/dev/sound/pcm/sound.c b/sys/dev/sound/pcm/sound.c
index c5c0b6dda57..71dc8c3a186 100644
--- a/sys/dev/sound/pcm/sound.c
+++ b/sys/dev/sound/pcm/sound.c
@@ -33,6 +33,8 @@ static int 	status_isopen = 0;
 static int 	status_init(char *buf, int size);
 static int 	status_read(struct uio *buf);
 
+MODULE_VERSION(snd_pcm, PCM_MODVER);
+
 static d_open_t sndopen;
 static d_close_t sndclose;
 static d_ioctl_t sndioctl;
diff --git a/sys/dev/sound/pcm/sound.h b/sys/dev/sound/pcm/sound.h
index 9a32f2b3145..2f659d87ba1 100644
--- a/sys/dev/sound/pcm/sound.h
+++ b/sys/dev/sound/pcm/sound.h
@@ -85,6 +85,12 @@ struct isa_device { int dummy; };
 #include <dev/sound/pcm/mixer.h>
 #include <dev/sound/pcm/dsp.h>
 
+#define PCM_MODVER	1
+
+#define PCM_MINVER	1
+#define PCM_PREFVER	PCM_MODVER
+#define PCM_MAXVER	1
+
 #define	MAGIC(unit) (0xa4d10de0 + unit)
 
 #define SD_F_SIMPLEX		0x00000001