diff --git a/plat/rockchip/rk3368/include/platform_def.h b/plat/rockchip/rk3368/include/platform_def.h
index 12115b4..6fcf2ba 100644
--- a/plat/rockchip/rk3368/include/platform_def.h
+++ b/plat/rockchip/rk3368/include/platform_def.h
@@ -86,7 +86,7 @@
 #define PLAT_VIRT_ADDR_SPACE_SIZE   (1ULL << 32)
 #define PLAT_PHY_ADDR_SPACE_SIZE    (1ULL << 32)
 #define MAX_XLAT_TABLES		8
-#define MAX_MMAP_REGIONS	16
+#define MAX_MMAP_REGIONS	20
 
 /*******************************************************************************
  * Declarations and constants to access the mailboxes safely. Each mailbox is