diff --git a/pkgs/os-specific/linux/zen-kernel/2.6.31-zen5.nix b/pkgs/os-specific/linux/zen-kernel/2.6.31-zen5.nix
index a7b788c8e137..6b311c8689f7 100644
--- a/pkgs/os-specific/linux/zen-kernel/2.6.31-zen5.nix
+++ b/pkgs/os-specific/linux/zen-kernel/2.6.31-zen5.nix
@@ -178,6 +178,7 @@ let
     setOptionYes CONFIG_REISERFS_FS
     setOptionYes CONFIG_FUSE_FS
     setOptionYes CONFIG_ISO9660_FS
+    setOptionMod CONFIG_IPV6
   ''+
   (if a.lib.attrByPath ["ckSched"] false a then ''
     killOption CONFIG_CPU_CFS