diff --git a/plat/mediatek/mt8192/include/platform_def.h b/plat/mediatek/mt8192/include/platform_def.h
index e6e1f8d..8d43dc8 100644
--- a/plat/mediatek/mt8192/include/platform_def.h
+++ b/plat/mediatek/mt8192/include/platform_def.h
@@ -23,6 +23,8 @@
 #define MTK_DEV_RNG1_SIZE    0x10000000
 #define MTK_DEV_RNG2_BASE    0x0c000000
 #define MTK_DEV_RNG2_SIZE    0x600000
+#define MTK_MCDI_SRAM_BASE      0x11B000
+#define MTK_MCDI_SRAM_MAP_SIZE  0x1000
 
 #define GPIO_BASE        (IO_PHYS + 0x00005000)
 #define SPM_BASE         (IO_PHYS + 0x00006000)