diff --git a/usr.sbin/ndiscvt/ndiscvt.c b/usr.sbin/ndiscvt/ndiscvt.c
index 80eae836f080..733af8a3c0fc 100644
--- a/usr.sbin/ndiscvt/ndiscvt.c
+++ b/usr.sbin/ndiscvt/ndiscvt.c
@@ -377,7 +377,7 @@ main(int argc, char *argv[])
 
 	if (bin) {
 		sysfile = strdup(basename(sysfile));
-		ptr = sysfile;
+		ptr = (unsigned char *)sysfile;
 		while (*ptr) {
 			if (*ptr == '.')
 				*ptr = '_';
diff --git a/usr.sbin/ngctl/msg.c b/usr.sbin/ngctl/msg.c
index c332879a0ac3..f74efde1bca9 100644
--- a/usr.sbin/ngctl/msg.c
+++ b/usr.sbin/ngctl/msg.c
@@ -143,7 +143,7 @@ MsgRead()
 		if (m->header.arglen == 0)
 			printf("No arguments\n");
 		else
-			DumpAscii(m->data, m->header.arglen);
+			DumpAscii((const u_char *)m->data, m->header.arglen);
 		free(m);
 		return;
 	}