diff --git a/bootstrap/templates/kubernetes/bootstrap/talos/talconfig.yaml.j2 b/bootstrap/templates/kubernetes/bootstrap/talos/talconfig.yaml.j2
index 9cf85225..68b6b304 100644
--- a/bootstrap/templates/kubernetes/bootstrap/talos/talconfig.yaml.j2
+++ b/bootstrap/templates/kubernetes/bootstrap/talos/talconfig.yaml.j2
@@ -41,7 +41,7 @@ nodes:
     controlPlane: #{ (item.controller) | string | lower }#
     networkInterfaces:
       - deviceSelector:
-          hardwareAddr: "#{ item.talos_nic }#"
+          hardwareAddr: "#{ item.talos_nic | lower }#"
         dhcp: false
         #% if bootstrap_talos.vlan %#
         vlans: