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-rw-r--r--sway/commands.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sway/commands.c b/sway/commands.c
index 359856cc..e72b8916 100644
--- a/sway/commands.c
+++ b/sway/commands.c
@@ -1,4 +1,4 @@
-#define _XOPEN_SOURCE 500
+#define _POSIX_C_SOURCE 200809
#include <ctype.h>
#include <stdarg.h>
#include <stdlib.h>