diff --git a/sys/conf/param.c b/sys/conf/param.c
index b88076fcd76c..17dcc1704857 100644
--- a/sys/conf/param.c
+++ b/sys/conf/param.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: param.c,v 1.33 2000/03/23 06:48:37 thorpej Exp $	*/
+/*	$NetBSD: param.c,v 1.34 2000/03/28 05:14:03 simonb Exp $	*/
 
 /*
  * Copyright (c) 1980, 1986, 1989 Regents of the University of California.
@@ -141,6 +141,7 @@ struct	shminfo shminfo = {
 	SHMSEG,
 	SHMALL
 };
+struct shmid_ds *shmsegs;
 #endif
 
 /*
diff --git a/sys/sys/msg.h b/sys/sys/msg.h
index ba2e490df06d..61a3d393f82f 100644
--- a/sys/sys/msg.h
+++ b/sys/sys/msg.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: msg.h,v 1.11 1999/08/25 05:05:49 thorpej Exp $	*/
+/*	$NetBSD: msg.h,v 1.12 2000/03/28 05:14:04 simonb Exp $	*/
 
 /*-
  * Copyright (c) 1999 The NetBSD Foundation, Inc.
@@ -137,7 +137,7 @@ struct msginfo {
 				   (see notes above) */
 		msgseg;		/* number of message segments */
 };
-struct msginfo	msginfo;
+extern struct msginfo msginfo;
 
 #ifndef MSGSSZ
 #define MSGSSZ	8		/* Each segment must be 2^N long */
diff --git a/sys/sys/sem.h b/sys/sys/sem.h
index 45deb5c846cf..87764d82e36d 100644
--- a/sys/sys/sem.h
+++ b/sys/sys/sem.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: sem.h,v 1.10 1999/08/25 05:05:49 thorpej Exp $	*/
+/*	$NetBSD: sem.h,v 1.11 2000/03/28 05:14:04 simonb Exp $	*/
 
 /*-
  * Copyright (c) 1999 The NetBSD Foundation, Inc.
@@ -152,7 +152,7 @@ struct seminfo {
 		semvmx,		/* semaphore maximum value */
 		semaem;		/* adjust on exit max value */
 };
-struct seminfo	seminfo;
+extern struct seminfo seminfo;
 
 /* internal "mode" bits */
 #define	SEM_ALLOC	01000	/* semaphore is allocated */
diff --git a/sys/sys/shm.h b/sys/sys/shm.h
index 07d549cb0e3a..5d50c9f577c2 100644
--- a/sys/sys/shm.h
+++ b/sys/sys/shm.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: shm.h,v 1.24 1999/12/04 12:33:03 ragge Exp $	*/
+/*	$NetBSD: shm.h,v 1.25 2000/03/28 05:14:04 simonb Exp $	*/
 
 /*-
  * Copyright (c) 1999 The NetBSD Foundation, Inc.
@@ -135,8 +135,8 @@ struct shminfo {
 	int	shmseg;		/* max shared memory segments per process */
 	int	shmall;		/* max amount of shared memory (pages) */
 };
-struct shminfo shminfo;
-struct shmid_ds *shmsegs;
+extern struct shminfo shminfo;
+extern struct shmid_ds *shmsegs;
 
 struct vmspace;