1 files changed, 1 insertions, 1 deletions
diff --git a/dump.c b/dump.c
index 63ebba3..f9f636f 100644
--- a/dump.c
+++ b/dump.c
@@ -14,7 +14,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#define _POSIX_C_SOURCE 2
+#define _XOPEN_SOURCE
 
 #include <err.h>
 #include <stdbool.h>