diff --git a/weex_core/Source/include/WeexApiValue.h b/weex_core/Source/include/WeexApiValue.h
index f2fefa9774..2daf0864ab 100644
--- a/weex_core/Source/include/WeexApiValue.h
+++ b/weex_core/Source/include/WeexApiValue.h
@@ -19,6 +19,8 @@
 
 #pragma once
 
+#include "stdlib.h"
+
 struct WeexString {
     uint32_t length;
     uint16_t content[1];