diff --git a/sys/dev/mcd/mcd.c b/sys/dev/mcd/mcd.c
index 355b9113bd0..bfa07c51ba5 100644
--- a/sys/dev/mcd/mcd.c
+++ b/sys/dev/mcd/mcd.c
@@ -40,7 +40,7 @@
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- *	$Id: mcd.c,v 1.76 1996/04/07 17:32:14 bde Exp $
+ *	$Id: mcd.c,v 1.77 1996/05/03 14:57:24 phk Exp $
  */
 static char COPYRIGHT[] = "mcd-driver (C)1993 by H.Veit & B.Moore";
 
@@ -279,6 +279,7 @@ int mcd_attach(struct isa_device *dev)
 	cd->iobase = dev->id_iobase;
 	cd->flags |= MCDINIT;
 	mcd_soft_reset(unit);
+	TAILQ_INIT(&cd->head);
 
 #ifdef NOTYET
 	/* wire controller for interrupts and dma */
diff --git a/sys/dev/scd/scd.c b/sys/dev/scd/scd.c
index 8532c662f4f..d5a7d87b3f8 100644
--- a/sys/dev/scd/scd.c
+++ b/sys/dev/scd/scd.c
@@ -41,7 +41,7 @@
  */
 
 
-/* $Id: scd.c,v 1.18 1996/03/28 14:28:50 scrappy Exp $ */
+/* $Id: scd.c,v 1.19 1996/05/03 14:57:25 phk Exp $ */
 
 /* Please send any comments to micke@dynas.se */
 
@@ -244,6 +244,7 @@ int scd_attach(struct isa_device *dev)
 
 	cd->flags = SCDINIT;
 	cd->audio_status = CD_AS_AUDIO_INVALID;
+	TAILQ_INIT(&cd->head);
 
 #ifdef DEVFS
 #define SCD_UID 0
diff --git a/sys/i386/isa/matcd/matcd.c b/sys/i386/isa/matcd/matcd.c
index 04a15d7b429..2bf569e56fc 100644
--- a/sys/i386/isa/matcd/matcd.c
+++ b/sys/i386/isa/matcd/matcd.c
@@ -337,7 +337,7 @@ static char	MATCDVERSION[]="Version  1(26) 18-Oct-95";
 static char	MATCDCOPYRIGHT[] = "Matsushita CD-ROM driver, Copr. 1994,1995 Frank Durda IV";
 /*	The proceeding strings may not be changed*/
 
-/* $Id: matcd.c,v 1.15 1996/03/28 14:29:52 scrappy Exp $ */
+/* $Id: matcd.c,v 1.16 1996/05/03 14:58:09 phk Exp $ */
 
 /*---------------------------------------------------------------------------
 	Include declarations
@@ -1382,6 +1382,7 @@ matcd_attach(struct isa_device *dev)
 #endif /*DEBUGPROBE*/
 	printf("matcdc%d Host interface type %d\n",
 		nextcontroller,iftype);
+	TAILQ_INIT(&request_head[nextcontroller]);
 	for (cdrive=0; cdrive<4; cdrive++) {	/*We're hunting drives...*/
 		zero_cmd(cmd);
 		cmd[0]=NOP;		/*A reasonably harmless command.
diff --git a/sys/i386/isa/mcd.c b/sys/i386/isa/mcd.c
index 355b9113bd0..bfa07c51ba5 100644
--- a/sys/i386/isa/mcd.c
+++ b/sys/i386/isa/mcd.c
@@ -40,7 +40,7 @@
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- *	$Id: mcd.c,v 1.76 1996/04/07 17:32:14 bde Exp $
+ *	$Id: mcd.c,v 1.77 1996/05/03 14:57:24 phk Exp $
  */
 static char COPYRIGHT[] = "mcd-driver (C)1993 by H.Veit & B.Moore";
 
@@ -279,6 +279,7 @@ int mcd_attach(struct isa_device *dev)
 	cd->iobase = dev->id_iobase;
 	cd->flags |= MCDINIT;
 	mcd_soft_reset(unit);
+	TAILQ_INIT(&cd->head);
 
 #ifdef NOTYET
 	/* wire controller for interrupts and dma */
diff --git a/sys/i386/isa/scd.c b/sys/i386/isa/scd.c
index 8532c662f4f..d5a7d87b3f8 100644
--- a/sys/i386/isa/scd.c
+++ b/sys/i386/isa/scd.c
@@ -41,7 +41,7 @@
  */
 
 
-/* $Id: scd.c,v 1.18 1996/03/28 14:28:50 scrappy Exp $ */
+/* $Id: scd.c,v 1.19 1996/05/03 14:57:25 phk Exp $ */
 
 /* Please send any comments to micke@dynas.se */
 
@@ -244,6 +244,7 @@ int scd_attach(struct isa_device *dev)
 
 	cd->flags = SCDINIT;
 	cd->audio_status = CD_AS_AUDIO_INVALID;
+	TAILQ_INIT(&cd->head);
 
 #ifdef DEVFS
 #define SCD_UID 0