diff --git a/Device.go b/Device.go
index e74f86d..83a5ee3 100644
--- a/Device.go
+++ b/Device.go
@@ -13,6 +13,7 @@ const (
 	DevicePropertyInterface            = DeviceInterface + ".Interface"
 	DevicePropertyIpInterface          = DeviceInterface + ".IpInterface"
 	DevicePropertyState                = DeviceInterface + ".State"
+	DevicePropertyManaged              = DeviceInterface + ".Managed"
 	DevicePropertyIP4Config            = DeviceInterface + ".Ip4Config"
 	DevicePropertyDeviceType           = DeviceInterface + ".DeviceType"
 	DevicePropertyAvailableConnections = DeviceInterface + ".AvailableConnections"
@@ -77,6 +78,12 @@ type Device interface {
 	// connection that is currently 'available' through this device.
 	GetAvailableConnections() []Connection
 
+	// Whether or not this device is managed by NetworkManager. Setting this property
+	// has a similar effect to configuring the device as unmanaged via the
+	// keyfile.unmanaged-devices setting in NetworkManager.conf. Changes to this value
+	// are not persistent and lost after NetworkManager restart.
+	GetManaged() bool
+
 	MarshalJSON() ([]byte, error)
 }
 
@@ -156,6 +163,10 @@ func (d *device) GetAvailableConnections() []Connection {
 	return conns
 }
 
+func (d *device) GetManaged() bool {
+	return d.getBoolProperty(DevicePropertyManaged)
+}
+
 func (d *device) marshalMap() map[string]interface{} {
 	return map[string]interface{}{
 		"Interface":            d.GetInterface(),