diff --git a/pkg/actuators/machine/actuator.go b/pkg/actuators/machine/actuator.go
index 437836acf8..33f13f0bad 100644
--- a/pkg/actuators/machine/actuator.go
+++ b/pkg/actuators/machine/actuator.go
@@ -186,7 +186,7 @@ func (a *Actuator) CreateMachine(cluster *clusterv1.Cluster, machine *clusterv1.
 	}
 
 	// We explicitly do NOT want to remove stopped masters.
-	if !IsMaster(machine) {
+	if !isMaster(machine) {
 		// Prevent having a lot of stopped nodes sitting around.
 		err = removeStoppedMachine(machine, awsClient)
 		if err != nil {
diff --git a/pkg/actuators/machine/utils.go b/pkg/actuators/machine/utils.go
index d23dd295ae..7af2008d63 100644
--- a/pkg/actuators/machine/utils.go
+++ b/pkg/actuators/machine/utils.go
@@ -180,8 +180,8 @@ func providerConfigFromMachine(client client.Client, machine *clusterv1.Machine,
 	return &config, nil
 }
 
-// IsMaster returns true if the machine is part of a cluster's control plane
-func IsMaster(machine *clusterv1.Machine) bool {
+// isMaster returns true if the machine is part of a cluster's control plane
+func isMaster(machine *clusterv1.Machine) bool {
 	if machineType, exists := machine.ObjectMeta.Labels[providerconfigv1.MachineTypeLabel]; exists && machineType == "master" {
 		return true
 	}