diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 943d6b032..a97e03bf2 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,8 @@
+2013-11-13  Jon TURNEY  <jon.turney@dronecode.org.uk>
+
+	* include/cygwin/stdlib.h(initstate, random, setstate, srandom) :
+	Prototype if not __STRICT_ANSI__ or _XOPEN_SOURCE is defined appropriately.
+
 2013-11-28  Alexey Pavlov  <alexpux@gmail.com>
 
 	* include/glob.h: Fix invalid use of 'restrict' error.
diff --git a/winsup/cygwin/include/cygwin/stdlib.h b/winsup/cygwin/include/cygwin/stdlib.h
index 79fa2b470..fb9c924a7 100644
--- a/winsup/cygwin/include/cygwin/stdlib.h
+++ b/winsup/cygwin/include/cygwin/stdlib.h
@@ -30,10 +30,14 @@ void	setprogname (const char *);
 #ifndef __STRICT_ANSI__
 char *canonicalize_file_name (const char *);
 int unsetenv (const char *);
+#endif /*__STRICT_ANSI__*/
+#if !defined(__STRICT_ANSI__) || (_XOPEN_SOURCE >= 500) || (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED))
 char *initstate (unsigned seed, char *state, size_t size);
 long random (void);
 char *setstate (const char *state);
 void srandom (unsigned);
+#endif
+#ifndef __STRICT_ANSI__
 char *ptsname (int);
 int ptsname_r(int, char *, size_t);
 int getpt (void);