diff --git a/plat/mediatek/mt8186/include/platform_def.h b/plat/mediatek/mt8186/include/platform_def.h
index bf1bbef..d73466b 100644
--- a/plat/mediatek/mt8186/include/platform_def.h
+++ b/plat/mediatek/mt8186/include/platform_def.h
@@ -30,6 +30,11 @@
 #define UART_BAUDRATE			115200
 
 /*******************************************************************************
+ * EMI MPU related constants
+ ******************************************************************************/
+#define EMI_MPU_BASE		(IO_PHYS + 0x0021B000)
+
+/*******************************************************************************
  * System counter frequency related constants
  ******************************************************************************/
 #define SYS_COUNTER_FREQ_IN_TICKS	13000000