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-rw-r--r--src/core/window-props.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/core/window-props.c b/src/core/window-props.c
index cb6e38185..f0454fe47 100644
--- a/src/core/window-props.c
+++ b/src/core/window-props.c
@@ -35,7 +35,7 @@
*/
#define _GNU_SOURCE
-#define _SVID_SOURCE /* for gethostname() */
+#define _XOPEN_SOURCE 500 /* for gethostname() */
#include <config.h>
#include "window-props.h"