1 files changed, 1 insertions, 0 deletions
diff --git a/vis.c b/vis.c
index f0b9e11..3804246 100644
--- a/vis.c
+++ b/vis.c
@@ -13,6 +13,7 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#define _DEFAULT_SOURCE
 #define _POSIX_SOURCE
 /* Necessary for SIGWINCH on OpenBSD */
 #define _BSD_SOURCE