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-rw-r--r--btrfs-list.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/btrfs-list.c b/btrfs-list.c
index 77417059..9dedb5d2 100644
--- a/btrfs-list.c
+++ b/btrfs-list.c
@@ -16,6 +16,7 @@
* Boston, MA 021110-1307, USA.
*/
+#define _GNU_SOURCE
#ifndef __CHECKER__
#include <sys/ioctl.h>
#include <sys/mount.h>