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-rw-r--r--common.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/common.c b/common.c
index 25bf761..26be47f 100644
--- a/common.c
+++ b/common.c
@@ -19,7 +19,7 @@
*/
#define _POSIX_C_SOURCE 199309L
-#define _XOPEN_SOURCE 500
+#define _XOPEN_SOURCE 600
#include <stdio.h>
#include <stdlib.h>