diff --git a/plugins/altos/fu-altos-device.c b/plugins/altos/fu-altos-device.c
index e3e999a20..3725ac45d 100644
--- a/plugins/altos/fu-altos-device.c
+++ b/plugins/altos/fu-altos-device.c
@@ -662,9 +662,10 @@ fu_altos_device_probe_bootloader (FuAltosDevice *self, GError **error)
 	return TRUE;
 }
 
-gboolean
-fu_altos_device_probe (FuAltosDevice *self, GError **error)
+static gboolean
+fu_altos_device_probe (FuDevice *device, GError **error)
 {
+	FuAltosDevice *self = FU_ALTOS_DEVICE (device);
 	GUsbDevice *usb_device = fu_usb_device_get_dev (FU_USB_DEVICE (self));
 
 	/* bootloader uses tty */
@@ -749,6 +750,7 @@ fu_altos_device_class_init (FuAltosDeviceClass *klass)
 {
 	GObjectClass *object_class = G_OBJECT_CLASS (klass);
 	FuDeviceClass *klass_device = FU_DEVICE_CLASS (klass);
+	klass_device->probe = fu_altos_device_probe;
 	klass_device->write_firmware = fu_altos_device_write_firmware;
 	klass_device->read_firmware = fu_altos_device_read_firmware;
 	object_class->finalize = fu_altos_device_finalize;
diff --git a/plugins/altos/fu-altos-device.h b/plugins/altos/fu-altos-device.h
index 373e49842..a61ac9fc1 100644
--- a/plugins/altos/fu-altos-device.h
+++ b/plugins/altos/fu-altos-device.h
@@ -36,8 +36,6 @@ FuAltosDevice	*fu_altos_device_new			(GUsbDevice *usb_device);
 FuAltosDeviceKind fu_altos_device_kind_from_string	(const gchar	*kind);
 const gchar	*fu_altos_device_kind_to_string		(FuAltosDeviceKind kind);
 FuAltosDeviceKind fu_altos_device_get_kind		(FuAltosDevice	*device);
-gboolean	 fu_altos_device_probe			(FuAltosDevice	*device,
-							 GError		**error);
 
 G_END_DECLS
 
diff --git a/plugins/altos/fu-plugin-altos.c b/plugins/altos/fu-plugin-altos.c
index d5d73c2da..3e5d8703f 100644
--- a/plugins/altos/fu-plugin-altos.c
+++ b/plugins/altos/fu-plugin-altos.c
@@ -30,7 +30,7 @@ fu_plugin_usb_device_added (FuPlugin *plugin, GUsbDevice *usb_device, GError **e
 		return TRUE;
 
 	/* get device properties */
-	if (!fu_altos_device_probe (dev, error))
+	if (!fu_device_probe (FU_DEVICE (dev), error))
 		return FALSE;
 
 	/* only the bootloader can do the update */