--- suspend-utils-1.0/load.c
+++ suspend-utils-1.0-patch/load.c
@@ -17,6 +17,7 @@
 #include <time.h>
 #include <syscall.h>
 #include <libgen.h>
+#define _GNU_SOURCE
 #include <fcntl.h>
 #include <unistd.h>
 #include <stdio.h>
--- suspend-utils-1.0/resume.c
+++ suspend-utils-1.0-patch/resume.c
@@ -18,6 +18,7 @@
 #include <time.h>
 #include <syscall.h>
 #include <libgen.h>
+#define _GNU_SOURCE
 #include <fcntl.h>
 #include <unistd.h>
 #include <stdio.h>
--- suspend-utils-1.0/suspend.c
+++ suspend-utils-1.0-patch/suspend.c
@@ -24,6 +24,7 @@
 #include <linux/tiocl.h>
 #include <syscall.h>
 #include <libgen.h>
+#define _GNU_SOURCE
 #include <fcntl.h>
 #include <unistd.h>
 #include <stdio.h>