diff --git a/core/iwasm/include/lib_export.h b/core/iwasm/include/lib_export.h
index 0ca668f52e..19a328a357 100644
--- a/core/iwasm/include/lib_export.h
+++ b/core/iwasm/include/lib_export.h
@@ -11,6 +11,7 @@
 #ifndef _LIB_EXPORT_H_
 #define _LIB_EXPORT_H_
 
+#include <stddef.h>
 #include <stdint.h>
 
 #ifdef __cplusplus