diff --git a/vblade/aoe.c b/vblade/aoe.c

index 168f923..e8dd800 100644

--- a/vblade/aoe.c

+++ b/vblade/aoe.c

@@ -18,6 +18,18 @@ enum {

 	Alen= 6,

 };

+

+int	shelf;

+int	slot;

+ulong	aoetag;

+uchar	mac[6];

+int	bfd;		// block file descriptor

+int	sfd;		// socket file descriptor

+vlong	size;		// size of vblade

+vlong	offset;

+char	*progname;

+char	serial[Nserial+1];

+

 uchar masks[Nmasks*Alen];

 int nmasks;

 uchar srr[Nsrr*Alen];

diff --git a/vblade/ata.c b/vblade/ata.c

index a53310f..18ad6f8 100644

--- a/vblade/ata.c

+++ b/vblade/ata.c

@@ -6,6 +6,12 @@

 #include "dat.h"

 #include "fns.h"

+extern vlong	size;

+extern vlong	offset;

+extern int	bfd;

+extern int	sfd;

+extern char	serial[];

+

 enum {

 	// err bits

 	UNC =	1<<6,

diff --git a/vblade/bpf.c b/vblade/bpf.c

index 2527348..0eab1d9 100644

--- a/vblade/bpf.c

+++ b/vblade/bpf.c

@@ -8,6 +8,9 @@

 #include "dat.h"

 #include "fns.h"

+extern int	shelf;

+extern int	slot;

+

 struct bpf_insn {

 	ushort code;

 	uchar jt;

diff --git a/vblade/dat.h b/vblade/dat.h

index ddd17f6..e9d037f 100644

--- a/vblade/dat.h

+++ b/vblade/dat.h

@@ -162,14 +162,3 @@ enum {

 	Nserial= 20,

 };

-

-int	shelf, slot;

-ulong	aoetag;

-uchar	mac[6];

-int	bfd;		// block file descriptor

-int	sfd;		// socket file descriptor

-vlong	size;		// size of vblade

-vlong	offset;

-char	*progname;

-char	serial[Nserial+1];

-

diff --git a/vblade/freebsd.c b/vblade/freebsd.c

index 6b657c0..6e864a5 100644

--- a/vblade/freebsd.c

+++ b/vblade/freebsd.c

@@ -41,6 +41,9 @@

 static uchar *pktbuf = NULL;

 static int pktbufsz = 0;

+extern int	shelf;

+extern int	slot;

+

 int

 dial(char *eth, int bufcnt)

 {

diff --git a/vblade/linux.c b/vblade/linux.c

index a8fb3c7..deb5ec3 100644

--- a/vblade/linux.c

+++ b/vblade/linux.c

@@ -31,7 +31,8 @@

 int	getindx(int, char *);

 int	getea(int, char *, uchar *);

-

+extern int	shelf;

+extern int	slot;

 int

 dial(char *eth, int bufcnt)		// get us a raw connection to an interface