diff --git a/install_amavis.sh b/install_amavis.sh
index f2bca6b..40f1453 100755
--- a/install_amavis.sh
+++ b/install_amavis.sh
@@ -915,6 +915,7 @@ _needed_packages_base="libnet-ldap-perl \
    libdbd-pg-perl \
    libdbi-perl \
    libdbi-dev \
+   libnet-patricia-perl \
    g++ \
    cpanminus"
 for _pkg in $_needed_packages_base ; do