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-rw-r--r--swaybar/bar.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/swaybar/bar.c b/swaybar/bar.c
index 2178f542..47c89a39 100644
--- a/swaybar/bar.c
+++ b/swaybar/bar.c
@@ -1,4 +1,4 @@
-#define _XOPEN_SOURCE 500
+#define _POSIX_C_SOURCE 200809L
#include <assert.h>
#include <errno.h>
#include <fcntl.h>