diff --git a/abuild-rmtemp.c b/abuild-rmtemp.c
index 36a12ec..1fca31c 100644
--- a/abuild-rmtemp.c
+++ b/abuild-rmtemp.c
@@ -4,6 +4,7 @@
  * Distributed under GPL-2
  */
 
+#define _XOPEN_SOURCE 700
 #include <err.h>
 #include <errno.h>
 #include <ftw.h>