diff --git a/pkg/vcenter/adapter.go b/pkg/vcenter/adapter.go
index d71a8bf..7489914 100644
--- a/pkg/vcenter/adapter.go
+++ b/pkg/vcenter/adapter.go
@@ -81,9 +81,9 @@ func (a anyAdapter) Device() types.BaseVirtualDevice {
 
 func (a anyAdapter) String() string {
 	if a.VirtualE1000 != nil {
-		return fmt.Sprintf("%s", a.VirtualE1000.MacAddress)
+		return a.VirtualE1000.MacAddress
 	} else if a.VirtualVmxnet3 != nil {
-		return fmt.Sprintf("%s", a.VirtualVmxnet3.MacAddress)
+		return a.VirtualVmxnet3.MacAddress
 	} else {
 		panic("bug: no supported vNICs found")
 	}