--- src/entry.cc.orig	2016-09-27 14:21:12 UTC
+++ src/entry.cc
@@ -22,7 +22,6 @@
  * SOFTWARE.
  */
 
-#define _XOPEN_SOURCE   500
 #include "api.hh"
 #include "compat.hh"
 #include "globals.hh"