@@ -22,10 +22,11 @@
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
+#define _C99_SOURCE
 #define _POSIX_SOURCE
 
 #include <stdio.h>
 #include <string.h>
 #include <inttypes.h>