diff --git a/sys/dev/ar/if_ar.c b/sys/dev/ar/if_ar.c
index 79bfbba29f7f..49038493c658 100644
--- a/sys/dev/ar/if_ar.c
+++ b/sys/dev/ar/if_ar.c
@@ -276,7 +276,8 @@ static struct ng_type typestruct = {
 	ngar_connect,
 	ngar_rcvdata,
 	ngar_rcvdata,
-	ngar_disconnect 
+	ngar_disconnect,
+	NULL
 };
 
 static int	ngar_done_init = 0;
diff --git a/sys/dev/ar/if_ar_isa.c b/sys/dev/ar/if_ar_isa.c
index 79bfbba29f7f..49038493c658 100644
--- a/sys/dev/ar/if_ar_isa.c
+++ b/sys/dev/ar/if_ar_isa.c
@@ -276,7 +276,8 @@ static struct ng_type typestruct = {
 	ngar_connect,
 	ngar_rcvdata,
 	ngar_rcvdata,
-	ngar_disconnect 
+	ngar_disconnect,
+	NULL
 };
 
 static int	ngar_done_init = 0;
diff --git a/sys/dev/sr/if_sr.c b/sys/dev/sr/if_sr.c
index 66a7dd1d6792..c331e3f55743 100644
--- a/sys/dev/sr/if_sr.c
+++ b/sys/dev/sr/if_sr.c
@@ -396,7 +396,8 @@ static struct ng_type typestruct = {
 	ngsr_connect,
 	ngsr_rcvdata,
 	ngsr_rcvdata,
-	ngsr_disconnect 
+	ngsr_disconnect,
+	NULL
 };
 
 static int	ngsr_done_init = 0;
diff --git a/sys/dev/sr/if_sr_isa.c b/sys/dev/sr/if_sr_isa.c
index 66a7dd1d6792..c331e3f55743 100644
--- a/sys/dev/sr/if_sr_isa.c
+++ b/sys/dev/sr/if_sr_isa.c
@@ -396,7 +396,8 @@ static struct ng_type typestruct = {
 	ngsr_connect,
 	ngsr_rcvdata,
 	ngsr_rcvdata,
-	ngsr_disconnect 
+	ngsr_disconnect,
+	NULL
 };
 
 static int	ngsr_done_init = 0;
diff --git a/sys/i386/isa/if_ar.c b/sys/i386/isa/if_ar.c
index 79bfbba29f7f..49038493c658 100644
--- a/sys/i386/isa/if_ar.c
+++ b/sys/i386/isa/if_ar.c
@@ -276,7 +276,8 @@ static struct ng_type typestruct = {
 	ngar_connect,
 	ngar_rcvdata,
 	ngar_rcvdata,
-	ngar_disconnect 
+	ngar_disconnect,
+	NULL
 };
 
 static int	ngar_done_init = 0;
diff --git a/sys/i386/isa/if_sr.c b/sys/i386/isa/if_sr.c
index 66a7dd1d6792..c331e3f55743 100644
--- a/sys/i386/isa/if_sr.c
+++ b/sys/i386/isa/if_sr.c
@@ -396,7 +396,8 @@ static struct ng_type typestruct = {
 	ngsr_connect,
 	ngsr_rcvdata,
 	ngsr_rcvdata,
-	ngsr_disconnect 
+	ngsr_disconnect,
+	NULL
 };
 
 static int	ngsr_done_init = 0;