1 files changed, 1 insertions, 2 deletions

diff --git a/swaynag/main.c b/swaynag/main.c
index bae3c0e2..9f00ac7e 100644
--- a/swaynag/main.c
+++ b/swaynag/main.c
@@ -1,4 +1,4 @@
-#define _XOPEN_SOURCE 500
+#define _POSIX_C_SOURCE 200809L
 #include <stdlib.h>
 #include <signal.h>
 #include "log.h"
@@ -130,4 +130,3 @@ cleanup:
         swaynag_destroy(&swaynag);
         return exit_code;
 }
-