1 files changed, 1 insertions, 0 deletions

diff --git a/attract.c b/attract.c
index 5ab9aa7..7a31bb9 100644
--- a/attract.c
+++ b/attract.c
@@ -1,3 +1,4 @@
+#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdbool.h>