diff --git a/src/sound/snd_cms.c b/src/sound/snd_cms.c
index 631e00c6a..15a065776 100644
--- a/src/sound/snd_cms.c
+++ b/src/sound/snd_cms.c
@@ -207,7 +207,7 @@ static const device_config_t cms_config[] =
 const device_t cms_device =
 {
         "Creative Music System / Game Blaster",
-        0, 0,
+        DEVICE_ISA, 0,
         cms_init, cms_close, NULL,
         { NULL }, NULL, NULL,
         cms_config
diff --git a/src/sound/snd_gus.c b/src/sound/snd_gus.c
index fe94ebf2f..003b93b58 100644
--- a/src/sound/snd_gus.c
+++ b/src/sound/snd_gus.c
@@ -1315,7 +1315,7 @@ static const device_config_t gus_config[] = {
 const device_t gus_device =
 {
         "Gravis UltraSound",
-        DEVICE_ISA,
+        DEVICE_ISA | DEVICE_AT,
 	0,
         gus_init, gus_close, NULL,
 	{ NULL },
diff --git a/src/sound/snd_ssi2001.c b/src/sound/snd_ssi2001.c
index 55740fac9..400700131 100644
--- a/src/sound/snd_ssi2001.c
+++ b/src/sound/snd_ssi2001.c
@@ -118,7 +118,7 @@ static const device_config_t ssi2001_config[] =
 const device_t ssi2001_device =
 {
         "Innovation SSI-2001",
-        0, 0,
+        DEVICE_ISA, 0,
         ssi2001_init, ssi2001_close, NULL,
 	{ NULL }, NULL, NULL,
         ssi2001_config