diff --git a/plat/st/stm32mp1/stm32mp1_def.h b/plat/st/stm32mp1/stm32mp1_def.h
index 8ca6123..542895a 100644
--- a/plat/st/stm32mp1/stm32mp1_def.h
+++ b/plat/st/stm32mp1/stm32mp1_def.h
@@ -71,6 +71,7 @@
 
 #define STM32MP1_REV_B		U(0x2000)
 #if STM32MP13
+#define STM32MP1_REV_Y		U(0x1003)
 #define STM32MP1_REV_Z		U(0x1001)
 #endif
 #if STM32MP15