diff --git a/include/stdarg.h b/include/stdarg.h
index fe0fa9f07..be9ce537f 100644
--- a/include/stdarg.h
+++ b/include/stdarg.h
@@ -40,7 +40,7 @@
 
 typedef unsigned char* va_list;
 
-#define va_start(ap, fix)      	ap = (va_list)&fix + __argsize__ - __fixargs__
+#define va_start(ap, fix)      	ap = ((va_list)&(fix))
 #define va_arg(ap,type)	       	(*(type*)(ap -= ((sizeof (type) + 1) & ~1)))
 #define va_copy(dest, src)	((dest)=(src))
 #define va_end(ap)