diff --git a/lib/puppet/provider/libvirt_network/virsh.rb b/lib/puppet/provider/libvirt_network/virsh.rb
index 41a298c..0c044ba 100644
--- a/lib/puppet/provider/libvirt_network/virsh.rb
+++ b/lib/puppet/provider/libvirt_network/virsh.rb
@@ -93,6 +93,9 @@ def content
     xml.root.elements.delete('//mac')
     # remove the connections
     xml.root.attributes.delete('connections')
+    xml.root.elements.each("//forward[@mode='passthrough']/interface") do |el|
+      el.attributes.delete('connections');
+    end
     formatter = REXML::Formatters::Pretty.new(2)
     formatter.compact = true
     output = ''.dup