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-rw-r--r--src/lib/timerwheel.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/lib/timerwheel.c b/src/lib/timerwheel.c
index 7e2779d0..76f0ab32 100644
--- a/src/lib/timerwheel.c
+++ b/src/lib/timerwheel.c
@@ -20,7 +20,10 @@
* Foundation, Inc., http://www.fsf.org/about/contact/.
*/
-#include <ouroboros/config.h>
+#define _POSIX_C_SOURCE 200112L
+
+#include "config.h"
+
#include <ouroboros/time_utils.h>
#include <ouroboros/errno.h>
#include <ouroboros/list.h>