diff --git a/libfwupdplugin/fu-device.c b/libfwupdplugin/fu-device.c
index 9c822d0b5..af9df1113 100644
--- a/libfwupdplugin/fu-device.c
+++ b/libfwupdplugin/fu-device.c
@@ -206,6 +206,8 @@ fu_device_internal_flag_to_string (FuDeviceInternalFlags flag)
 		return "replug-match-guid";
 	if (flag == FU_DEVICE_INTERNAL_FLAG_INHERIT_ACTIVATION)
 		return "inherit-activation";
+	if (flag == FU_DEVICE_INTERNAL_FLAG_IS_OPEN)
+		return "is-open";
 	return NULL;
 }
 
@@ -238,8 +240,12 @@ fu_device_internal_flag_from_string (const gchar *flag)
 		return FU_DEVICE_INTERNAL_FLAG_ENSURE_SEMVER;
 	if (g_strcmp0 (flag, "retry-open") == 0)
 		return FU_DEVICE_INTERNAL_FLAG_RETRY_OPEN;
-	if (g_strcmp0 (flag, "inherit-activation"))
+	if (g_strcmp0 (flag, "replug-match-guid") == 0)
+		return FU_DEVICE_INTERNAL_FLAG_REPLUG_MATCH_GUID;
+	if (g_strcmp0 (flag, "inherit-activation") == 0)
 		return FU_DEVICE_INTERNAL_FLAG_INHERIT_ACTIVATION;
+	if (g_strcmp0 (flag, "is-open") == 0)
+		return FU_DEVICE_INTERNAL_FLAG_IS_OPEN;
 	return FU_DEVICE_INTERNAL_FLAG_UNKNOWN;
 }
 
diff --git a/libfwupdplugin/fu-self-test.c b/libfwupdplugin/fu-self-test.c
index 79ab9ce18..9cf58e24b 100644
--- a/libfwupdplugin/fu-self-test.c
+++ b/libfwupdplugin/fu-self-test.c
@@ -1395,6 +1395,14 @@ fu_device_flags_func (void)
 {
 	g_autoptr(FuDevice) device = fu_device_new ();
 
+	/* bitfield */
+	for (guint64 i = 1; i < FU_DEVICE_INTERNAL_FLAG_UNKNOWN; i *= 2) {
+		const gchar *tmp = fu_device_internal_flag_to_string (i);
+		if (tmp == NULL)
+			break;
+		g_assert_cmpint (fu_device_internal_flag_from_string (tmp), ==, i);
+	}
+
 	g_assert_cmpint (fu_device_get_flags (device), ==, FWUPD_DEVICE_FLAG_NONE);
 
 	/* remove IS_BOOTLOADER if is a BOOTLOADER */