Index: base/nvti.c
--- base/nvti.c.orig
+++ base/nvti.c
@@ -46,7 +46,7 @@
 
 /* For strptime in time.h. */
 #undef _XOPEN_SOURCE
-#define _XOPEN_SOURCE
+#define _XOPEN_SOURCE 700
 #include "nvti.h"
 
 #include <stdio.h>   // for sscanf