--- a/load.c	
+++ a/load.c	
@@ -8,6 +8,7 @@ 
  * This file is released under the GPLv2.
  */
+#define _GNU_SOURCE
 #include "config.h"
 #include <sys/types.h>
 #include <sys/stat.h>
--- a/suspend.c	
+++ a/suspend.c	
@@ -9,6 +9,7 @@ 
  *
  */
+#define _GNU_SOURCE
 #include "config.h"
 #include <sys/types.h>
 #include <sys/stat.h>
--- a/swsusp.h	
+++ a/swsusp.h	
@@ -9,6 +9,7 @@ 
  *
  */
+#define _GNU_SOURCE
 #include <stdint.h>
 #include <linux/fs.h>
 #include <linux/suspend_ioctls.h>