diff --git a/README.md b/README.md
index 1388957..66d8751 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,6 @@
 # base16384
+> **Note**: This project used the awesome cross-patfrom binary compiling tool [cosmopolitan](https://github.com/jart/cosmopolitan)
+
 Encode binary file to printable utf16be, and vise versa.
 
 # Description 说明
diff --git a/base1432.c b/base1432.c
index af5714d..c71776b 100644
--- a/base1432.c
+++ b/base1432.c
@@ -1,6 +1,11 @@
 // base1432.c
 // fumiama 20220319
-#ifndef __cosmopolitan // always le
+#ifdef __cosmopolitan // always le
+#  define be16toh(x) bswap_16(x)
+#  define be32toh(x) bswap_32(x)
+#  define htobe16(x) bswap_16(x)
+#  define htobe32(x) bswap_32(x)
+#else
 #include <stdio.h>
 #include <stdint.h>
 #include <stdlib.h>