Index: include/stddef.h
===================================================================
RCS file: /cvsroot/src/include/stddef.h,v
retrieving revision 1.23
diff -u -r1.23 stddef.h
--- include/stddef.h	1 Mar 2020 22:08:17 -0000	1.23
+++ include/stddef.h	10 Mar 2020 12:44:23 -0000
@@ -67,12 +67,16 @@
     (&reinterpret_cast<const volatile char &>(static_cast<type *>(0)->member))))
 #endif  
 
-#if (__STDC_VERSION__ - 0) >= 201112L || (__cplusplus - 0) >= 201103L
+#if (__STDC_VERSION__ - 0) >= 199901L || defined(__cplusplus)
 typedef union {
 	void *_v;
 	long double _ld;
 	long long int _ll;
-} max_align_t;
+} __max_align_t;
+#endif
+
+#if (__STDC_VERSION__ - 0) >= 201112L || (__cplusplus - 0) >= 201103L
+typedef __max_align_t max_align_t;
 #endif
  
 #endif /* _STDDEF_H_ */