diff --git a/project/luatos/inc/luat_conf_bsp.h b/project/luatos/inc/luat_conf_bsp.h
index 1d89118..2496fc4 100644
--- a/project/luatos/inc/luat_conf_bsp.h
+++ b/project/luatos/inc/luat_conf_bsp.h
@@ -276,9 +276,8 @@
 #endif
 
 #ifdef TYPE_EC718M
-#ifndef LUAT_USE_PSRAM_AS_LUAHEAP
-#define LUAT_USE_PSRAM_AS_LUAHEAP 1
-#endif
+#undef LUAT_HEAP_SIZE
+#define LUAT_HEAP_SIZE (600*1024)
 #endif
 
 #endif
diff --git a/project/luatos/src/luat_malloc_ec7xx.c b/project/luatos/src/luat_malloc_ec7xx.c
index 71faec2..b23e681 100644
--- a/project/luatos/src/luat_malloc_ec7xx.c
+++ b/project/luatos/src/luat_malloc_ec7xx.c
@@ -32,8 +32,8 @@ static uint8_t* vmheap;
 #ifndef LUAT_HEAP_SIZE
 #define LUAT_HEAP_SIZE (200*1024)
 #endif
-#ifdef TPYE_EC718M
-static PLAT_FPSRAM_ZI_CUST uint8_t vmheap[LUAT_HEAP_SIZE] __attribute__((aligned(8)));
+#ifdef TYPE_EC718M
+static  __attribute__((__section__(".cust_sect_ap_psram_p2_bss.vmheap"))) uint8_t vmheap[LUAT_HEAP_SIZE] __attribute__((aligned(8)));
 #else
 static uint8_t vmheap[LUAT_HEAP_SIZE] __attribute__((aligned(8)));
 #endif