diff -up mrtg-2.16.4/lib/mrtg2/SNMP_Session.pm.orig mrtg-2.16.4/lib/mrtg2/SNMP_Session.pm
--- mrtg-2.16.4/lib/mrtg2/SNMP_Session.pm.orig	2010-05-17 15:59:20.000000000 +0200
+++ mrtg-2.16.4/lib/mrtg2/SNMP_Session.pm	2010-12-13 12:43:09.681833736 +0100
@@ -146,7 +146,7 @@ BEGIN {
 
     if (eval {local $SIG{__DIE__};require Socket6;} &&
        eval {local $SIG{__DIE__};require IO::Socket::INET6; IO::Socket::INET6->VERSION("1.26");}) {
-	import Socket6;
+	Socket6->import(qw(pack_sockaddr_in6 inet_pton getaddrinfo));
 	$ipv6_addr_len = length(pack_sockaddr_in6(161, inet_pton(AF_INET6(), "::1")));
 	$SNMP_Session::ipv6available = 1;
     }
@@ -601,7 +601,7 @@ use Carp;
 BEGIN {
     if($SNMP_Session::ipv6available) {
 	import IO::Socket::INET6;
-	import Socket6;
+	Socket6->import(qw(pack_sockaddr_in6 inet_pton getaddrinfo));
     }
 }