diff --git a/sys/dev/fdc/fdc.c b/sys/dev/fdc/fdc.c
index c4c86eede3c..f0a082f4c13 100644
--- a/sys/dev/fdc/fdc.c
+++ b/sys/dev/fdc/fdc.c
@@ -47,7 +47,7 @@
  * SUCH DAMAGE.
  *
  *	from:	@(#)fd.c	7.4 (Berkeley) 5/25/91
- *	$Id: fd.c,v 1.139 1999/05/07 07:03:24 phk Exp $
+ *	$Id: fd.c,v 1.140 1999/05/07 10:10:30 phk Exp $
  *
  */
 
@@ -109,12 +109,6 @@
 /* internally used only, not really from CMOS: */
 #define RTCFDT_144M_PRETENDED	0x1000
 
-/*
- * this biotab field doubles as a field for the physical unit number
- * on the controller
- */
-#define id_physid id_scsiid
-
 /* error returns for fd_cmd() */
 #define FD_FAILED -1
 #define FD_NOT_VALID -2
diff --git a/sys/i386/isa/fd.c b/sys/i386/isa/fd.c
index c4c86eede3c..f0a082f4c13 100644
--- a/sys/i386/isa/fd.c
+++ b/sys/i386/isa/fd.c
@@ -47,7 +47,7 @@
  * SUCH DAMAGE.
  *
  *	from:	@(#)fd.c	7.4 (Berkeley) 5/25/91
- *	$Id: fd.c,v 1.139 1999/05/07 07:03:24 phk Exp $
+ *	$Id: fd.c,v 1.140 1999/05/07 10:10:30 phk Exp $
  *
  */
 
@@ -109,12 +109,6 @@
 /* internally used only, not really from CMOS: */
 #define RTCFDT_144M_PRETENDED	0x1000
 
-/*
- * this biotab field doubles as a field for the physical unit number
- * on the controller
- */
-#define id_physid id_scsiid
-
 /* error returns for fd_cmd() */
 #define FD_FAILED -1
 #define FD_NOT_VALID -2
diff --git a/sys/i386/isa/wd.c b/sys/i386/isa/wd.c
index 6b201e4a0e3..b9346b886b9 100644
--- a/sys/i386/isa/wd.c
+++ b/sys/i386/isa/wd.c
@@ -34,7 +34,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)wd.c	7.2 (Berkeley) 5/9/91
- *	$Id: wd.c,v 1.195 1999/04/28 10:53:01 dt Exp $
+ *	$Id: wd.c,v 1.196 1999/05/07 07:03:30 phk Exp $
  */
 
 /* TODO:
@@ -115,12 +115,6 @@ extern void wdstart(int ctrlr);
 #define WDOPT_FORCEHD(x)	(((x)&0x0f00)>>8)
 #define WDOPT_MULTIMASK	0x00ff
 
-/*
- * This biotab field doubles as a field for the physical unit number on
- * the controller.
- */
-#define	id_physid id_scsiid
-
 /*
  * Drive states.  Used to initialize drive.
  */
diff --git a/sys/isa/fd.c b/sys/isa/fd.c
index c4c86eede3c..f0a082f4c13 100644
--- a/sys/isa/fd.c
+++ b/sys/isa/fd.c
@@ -47,7 +47,7 @@
  * SUCH DAMAGE.
  *
  *	from:	@(#)fd.c	7.4 (Berkeley) 5/25/91
- *	$Id: fd.c,v 1.139 1999/05/07 07:03:24 phk Exp $
+ *	$Id: fd.c,v 1.140 1999/05/07 10:10:30 phk Exp $
  *
  */
 
@@ -109,12 +109,6 @@
 /* internally used only, not really from CMOS: */
 #define RTCFDT_144M_PRETENDED	0x1000
 
-/*
- * this biotab field doubles as a field for the physical unit number
- * on the controller
- */
-#define id_physid id_scsiid
-
 /* error returns for fd_cmd() */
 #define FD_FAILED -1
 #define FD_NOT_VALID -2