diff --git a/plat/mediatek/mt8195/include/platform_def.h b/plat/mediatek/mt8195/include/platform_def.h
index 2a2f559da..8696f2a12 100644
--- a/plat/mediatek/mt8195/include/platform_def.h
+++ b/plat/mediatek/mt8195/include/platform_def.h
@@ -133,7 +133,7 @@
  * Platform memory map related constants
  ******************************************************************************/
 #define TZRAM_BASE			0x54600000
-#define TZRAM_SIZE			0x00030000
+#define TZRAM_SIZE			0x00040000
 
 /*******************************************************************************
  * BL31 specific defines.