diff --git a/templates/munin-node.conf.erb b/templates/munin-node.conf.erb
index 724bee0..c2edb1c 100644
--- a/templates/munin-node.conf.erb
+++ b/templates/munin-node.conf.erb
@@ -1,61 +1,61 @@
 # /etc/munin/munin-node.conf - config-file for munin-node
 #
 # This file is handled by puppet, any local changes will be lost
 #
 <%
   require 'ipaddr'
 
   addresses = []
   unrecognized = []
 
   Array(@allow).flatten.each do |line|
     begin
       a = IPAddr.new(line)
       if a.ipv4? or a.ipv6?
         addresses << line
       end
-    rescue IPAddr::InvalidAddressError
+    rescue ArgumentError, IPAddr::InvalidAddressError
       # Treat invalid addresses as "allow" arguments, as they can be
       # regular expressions.
       unrecognized << line
     end
   end
 -%>
 
 host_name  <%= scope.lookupvar('::fqdn') %>
 log_level  4
 log_file   <%= @log_dir %>/munin-node.log
 port       4949
 pid_file   /var/run/munin/munin-node.pid
 background 1
 setsid     1
 
 # Which port to bind to;
 
 user  root
 group <%= @file_group %>
 
 # Regexps for files to ignore
 
 ignore_file ~$
 ignore_file \.bak$
 ignore_file %$
 ignore_file \.dpkg-(tmp|new|old|dist)$
 ignore_file \.rpm(save|new)$
 ignore_file \.puppet-bak$
 
 # Hosts to allow
 <% addresses.each do |line| -%>
 <%   if line.match(/\//) -%>
 cidr_allow <%= line %>
 <%   else -%>
 allow ^<%= Regexp.quote(line) %>$
 <%   end -%>
 <% end -%>
 <% unrecognized.each do |line| -%>
 allow <%= line %>
 <% end -%>
 
 <% Array(@nodeconfig).each do |line| -%>
 <%= line %>
 <% end -%>