diff --git a/src/etc/inc/filter.inc b/src/etc/inc/filter.inc
index d1a64d62d..e7d1c68a7 100644
--- a/src/etc/inc/filter.inc
+++ b/src/etc/inc/filter.inc
@@ -572,6 +572,7 @@ function filter_configure_sync($verbose = false)
 
     /* set shared forwarding according to config option */
     set_single_sysctl('net.pf.share_forward', !empty($config['system']['pf_share_forward']) ? '1' : '0');
+    set_single_sysctl('net.pf.share_forward6', !empty($config['system']['pf_share_forward']) ? '1' : '0');
 
     /*
      * If we are not using bogonsv6 then we can remove any