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-rw-r--r--lib/draw/curses.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/draw/curses.c b/lib/draw/curses.c
index 0304dd5..6ebfb45 100644
--- a/lib/draw/curses.c
+++ b/lib/draw/curses.c
@@ -1,5 +1,11 @@
#include "../internal.h"
+#if __APPLE__
+# define _C99_SOURCE
+# include <stdio.h> /* vsnprintf */
+# undef _C99_SOURCE
+#endif
+
#define _XOPEN_SOURCE 500
#include <signal.h> /* sigaction */
#include <stdarg.h> /* vsnprintf */