diff --git a/network/ulogd2/ulogd2.conf b/network/ulogd2/ulogd2.conf
index a15128eb6..b04fbbb81 100644
--- a/network/ulogd2/ulogd2.conf
+++ b/network/ulogd2/ulogd2.conf
@@ -14,3 +14,6 @@
 
 # regenerate autotools infrastructure to not depend on a particular version
 hook_add preconf 5 'autoreconf -vfi'
+
+prefix=
+set_confopt