diff --git a/usr.sbin/mopd/mopchk/mopchk.c b/usr.sbin/mopd/mopchk/mopchk.c
index 5800775b23c9..39a83a76b9a2 100644
--- a/usr.sbin/mopd/mopchk/mopchk.c
+++ b/usr.sbin/mopd/mopchk/mopchk.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: mopchk.c,v 1.14 2016/06/08 01:15:26 christos Exp $	*/
+/*	$NetBSD: mopchk.c,v 1.15 2020/04/22 23:57:56 joerg Exp $	*/
 
 /*
  * Copyright (c) 1995-96 Mats O Jansson.  All rights reserved.
@@ -26,7 +26,7 @@
 
 #include "port.h"
 #ifndef lint
-__RCSID("$NetBSD: mopchk.c,v 1.14 2016/06/08 01:15:26 christos Exp $");
+__RCSID("$NetBSD: mopchk.c,v 1.15 2020/04/22 23:57:56 joerg Exp $");
 #endif
 
 /*
@@ -47,7 +47,7 @@ __RCSID("$NetBSD: mopchk.c,v 1.14 2016/06/08 01:15:26 christos Exp $");
  * The list of all interfaces that are being listened to.  rarp_loop()
  * "selects" on the descriptors in this list.
  */
-struct if_info *iflist;
+extern struct if_info *iflist;
 
 __dead static void	Usage(void);
 void	mopProcess(struct if_info *, u_char *);
diff --git a/usr.sbin/mopd/mopd/mopd.c b/usr.sbin/mopd/mopd/mopd.c
index 04392abfe277..803612ae220c 100644
--- a/usr.sbin/mopd/mopd/mopd.c
+++ b/usr.sbin/mopd/mopd/mopd.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: mopd.c,v 1.15 2016/06/08 01:11:49 christos Exp $	*/
+/*	$NetBSD: mopd.c,v 1.16 2020/04/22 23:57:56 joerg Exp $	*/
 
 /*
  * Copyright (c) 1993-96 Mats O Jansson.  All rights reserved.
@@ -25,7 +25,7 @@
  */
 #include "port.h"
 #ifndef lint
-__RCSID("$NetBSD: mopd.c,v 1.15 2016/06/08 01:11:49 christos Exp $");
+__RCSID("$NetBSD: mopd.c,v 1.16 2020/04/22 23:57:56 joerg Exp $");
 #endif
 
 /*
@@ -51,7 +51,7 @@ __RCSID("$NetBSD: mopd.c,v 1.15 2016/06/08 01:11:49 christos Exp $");
  * The list of all interfaces that are being listened to. 
  * "selects" on the descriptors in this list.
  */
-struct if_info *iflist;
+extern struct if_info *iflist;
 
 __dead static void	Usage(void);
 void	mopProcess(struct if_info *, u_char *);
diff --git a/usr.sbin/mopd/mopprobe/mopprobe.c b/usr.sbin/mopd/mopprobe/mopprobe.c
index fbe59e6e6b74..fcabde3ddfd9 100644
--- a/usr.sbin/mopd/mopprobe/mopprobe.c
+++ b/usr.sbin/mopd/mopprobe/mopprobe.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: mopprobe.c,v 1.13 2016/06/08 01:17:54 christos Exp $	*/
+/*	$NetBSD: mopprobe.c,v 1.14 2020/04/22 23:57:56 joerg Exp $	*/
 
 /*
  * Copyright (c) 1993-96 Mats O Jansson.  All rights reserved.
@@ -26,7 +26,7 @@
 
 #include "port.h"
 #ifndef lint
-__RCSID("$NetBSD: mopprobe.c,v 1.13 2016/06/08 01:17:54 christos Exp $");
+__RCSID("$NetBSD: mopprobe.c,v 1.14 2020/04/22 23:57:56 joerg Exp $");
 #endif
 
 /*
@@ -51,7 +51,7 @@ __RCSID("$NetBSD: mopprobe.c,v 1.13 2016/06/08 01:17:54 christos Exp $");
  * The list of all interfaces that are being listened to.  rarp_loop()
  * "selects" on the descriptors in this list.
  */
-struct if_info *iflist;
+extern struct if_info *iflist;
 
 __dead static void	Usage(void);
 void	mopProcess(struct if_info *, u_char *);
diff --git a/usr.sbin/mopd/moptrace/moptrace.c b/usr.sbin/mopd/moptrace/moptrace.c
index 431ab4cdff64..4e64a49a89ed 100644
--- a/usr.sbin/mopd/moptrace/moptrace.c
+++ b/usr.sbin/mopd/moptrace/moptrace.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: moptrace.c,v 1.12 2016/06/08 01:19:05 christos Exp $	*/
+/*	$NetBSD: moptrace.c,v 1.13 2020/04/22 23:57:56 joerg Exp $	*/
 
 /*
  * Copyright (c) 1993-95 Mats O Jansson.  All rights reserved.
@@ -26,7 +26,7 @@
 
 #include "port.h"
 #ifndef lint
-__RCSID("$NetBSD: moptrace.c,v 1.12 2016/06/08 01:19:05 christos Exp $");
+__RCSID("$NetBSD: moptrace.c,v 1.13 2020/04/22 23:57:56 joerg Exp $");
 #endif
 
 /*
@@ -51,7 +51,7 @@ __RCSID("$NetBSD: moptrace.c,v 1.12 2016/06/08 01:19:05 christos Exp $");
  * The list of all interfaces that are being listened to. 
  * "selects" on the descriptors in this list.
  */
-struct if_info *iflist;
+extern struct if_info *iflist;
 
 __dead static void	Usage(void);
 void	mopProcess(struct if_info *, u_char *);