diff -Naur nagios-plugins-2.1.1.org/plugins-root/check_dhcp.c nagios-plugins-2.1.1/plugins-root/check_dhcp.c
--- nagios-plugins-2.1.1.org/plugins-root/check_dhcp.c	Thu Jul 30 23:40:06 2015
+++ nagios-plugins-2.1.1/plugins-root/check_dhcp.c	Fri Jan 15 10:40:28 2016
@@ -326,7 +326,8 @@
 #elif defined(__bsd__)
 						/* King 2004	see ACKNOWLEDGEMENTS */
 
-        int                     mib[6], len;
+        int                     mib[6];
+        size_t                  len;
         char                    *buf;
         unsigned char           *ptr;
         struct if_msghdr        *ifm;