diff -ru nagios-plugins-1.4.3.orig/plugins-root/check_dhcp.c nagios-plugins-1.4.3/plugins-root/check_dhcp.c
--- nagios-plugins-1.4.3.orig/plugins-root/check_dhcp.c	2005-09-21 12:06:37.000000000 +0200
+++ nagios-plugins-1.4.3/plugins-root/check_dhcp.c	2006-05-21 15:40:27.000000000 +0200
@@ -192,7 +192,11 @@
 
 unsigned char client_hardware_address[MAX_DHCP_CHADDR_LENGTH]="";
 
+#if IFNAMSIZ > 8
+char network_interface_name[IFNAMSIZ]="eth0";
+#else
 char network_interface_name[8]="eth0";
+#endif
 
 u_int32_t packet_xid=0;