diff --git a/plat/st/stm32mp1/stm32mp1_def.h b/plat/st/stm32mp1/stm32mp1_def.h
index bce5994..ea18a30 100644
--- a/plat/st/stm32mp1/stm32mp1_def.h
+++ b/plat/st/stm32mp1/stm32mp1_def.h
@@ -62,6 +62,9 @@
 					 STM32MP_SYSRAM_SIZE - \
 					 STM32MP_NS_SYSRAM_SIZE)
 
+#define STM32MP_SCMI_NS_SHM_BASE	STM32MP_NS_SYSRAM_BASE
+#define STM32MP_SCMI_NS_SHM_SIZE	STM32MP_NS_SYSRAM_SIZE
+
 #define STM32MP_SEC_SYSRAM_BASE		STM32MP_SYSRAM_BASE
 #define STM32MP_SEC_SYSRAM_SIZE		(STM32MP_SYSRAM_SIZE - \
 					 STM32MP_NS_SYSRAM_SIZE)