#include <sys/types.h>
#endif
-#if !defined(OPENSSL_SYSNAME_VXWORKS)
+#if !defined(_POSIX_C_SOURCE) && defined(OPENSSL_SYS_VMS)
#ifndef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 2
#endif
-#endif /* !OPENSSL_SYSNAME_VXWORKS */
+#endif
#include <signal.h>
#include <stdio.h>
#include <string.h>