diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h
index 0432c95..d2c5288 100644
--- a/include/dm/uclass-id.h
+++ b/include/dm/uclass-id.h
@@ -89,6 +89,7 @@
 	UCLASS_MDIO,		/* MDIO bus */
 	UCLASS_MDIO_MUX,	/* MDIO MUX/switch */
 	UCLASS_MEMORY,		/* Memory Controller device */
+	UCLASS_SM,		/* Secure Monitor driver */
 	UCLASS_MISC,		/* Miscellaneous device */
 	UCLASS_MMC,		/* SD / MMC card or chip */
 	UCLASS_MOD_EXP,		/* RSA Mod Exp device */