+diff -Nur a/src/squidclamav.c b/src/squidclamav.c
+--- a/src/squidclamav.c 2012-10-29 09:46:06.000000000 +0100
++++ b/src/squidclamav.c 2013-07-06 19:10:56.375292374 +0200
+@@ -413,6 +413,9 @@
+ /* Suppress error: SSL certificate problem, verify that the CA cert is OK */
+ curl_easy_setopt (eh, CURLOPT_SSL_VERIFYHOST, 0);
+ curl_easy_setopt (eh, CURLOPT_SSL_VERIFYPEER, 0);
++
++ /* Prevent squidclamav from using IPv6 - fix by Nico Prenzel */
++ curl_easy_setopt (eh, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
+ }
+ }
+ /* create a squidguard child process and setup pipes */