diff --git a/sys/sys/kernel.h b/sys/sys/kernel.h
index a5f31be3adc7..805a601515e7 100644
--- a/sys/sys/kernel.h
+++ b/sys/sys/kernel.h
@@ -57,9 +57,7 @@
 /* 1.1 */
 extern unsigned long hostid;
 extern char hostname[MAXHOSTNAMELEN];
-extern int hostnamelen;
 extern char domainname[MAXHOSTNAMELEN];
-extern int domainnamelen;
 extern char kernelname[MAXPATHLEN];
 
 extern int tick;			/* usec per tick (1000000 / hz) */