diff --git a/src/internal/nolibc/stddef.h b/src/internal/nolibc/stddef.h
index 8288bae..1027d3e 100644
--- a/src/internal/nolibc/stddef.h
+++ b/src/internal/nolibc/stddef.h
@@ -1,6 +1,6 @@
 #ifndef _STDDEF_H
 #define _STDDEF_H
 
-#define offsetof(type, member) ((size_t)( (char *)&(((type *)0)->member) - (char *)0 ))
+#define offsetof(type, member) __offsetof(type, member)
 
 #endif