diff --git a/internal/controllers/machinedeployment/machinedeployment_controller.go b/internal/controllers/machinedeployment/machinedeployment_controller.go
index 64ac90c58d0f..03edc482858e 100644
--- a/internal/controllers/machinedeployment/machinedeployment_controller.go
+++ b/internal/controllers/machinedeployment/machinedeployment_controller.go
@@ -83,6 +83,7 @@ func (r *Reconciler) SetupWithManager(ctx context.Context, mgr ctrl.Manager, opt
 	err = ctrl.NewControllerManagedBy(mgr).
 		For(&clusterv1.MachineDeployment{}).
 		Owns(&clusterv1.MachineSet{}).
+		// Watches enqueues MachineDeployment for corresponding MachineSet resources, if no managed controller reference (owner) exists.
 		Watches(
 			&clusterv1.MachineSet{},
 			handler.EnqueueRequestsFromMapFunc(r.MachineSetToDeployments),
diff --git a/internal/controllers/machineset/machineset_controller.go b/internal/controllers/machineset/machineset_controller.go
index 58682dba2c7c..05c9d325a8ad 100644
--- a/internal/controllers/machineset/machineset_controller.go
+++ b/internal/controllers/machineset/machineset_controller.go
@@ -100,6 +100,7 @@ func (r *Reconciler) SetupWithManager(ctx context.Context, mgr ctrl.Manager, opt
 	err = ctrl.NewControllerManagedBy(mgr).
 		For(&clusterv1.MachineSet{}).
 		Owns(&clusterv1.Machine{}).
+		// Watches enqueues MachineSet for corresponding Machine resources, if no managed controller reference (owner) exists.
 		Watches(
 			&clusterv1.Machine{},
 			handler.EnqueueRequestsFromMapFunc(r.MachineToMachineSets),