diff --git a/roles/network/templates/nmconnection.j2 b/roles/network/templates/nmconnection.j2
index 867c357..4a27ddb 100644
--- a/roles/network/templates/nmconnection.j2
+++ b/roles/network/templates/nmconnection.j2
@@ -17,7 +17,7 @@ interface-name={{ item.device }}
 method=auto
 {% elif item.proto == 'static' %}
 method=manual
-address1={{ item.ipaddr }}/{{ item.netmask }}
+address1={{ item.ipaddr }}/{{ (item.ipaddr + '/' + item.netmask) | ansible.utils.ipaddr('prefix') }}
 {%   if item.gateway is defined %}
 gateway={{ item.gateway }}
 {%   endif %}