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-rw-r--r--test/polystar.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/test/polystar.c b/test/polystar.c
index c71ba41..7ab6cdc 100644
--- a/test/polystar.c
+++ b/test/polystar.c
@@ -1,6 +1,8 @@
/* libnsfb ploygon plotter test program */
+#ifndef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 199506L
+#endif
#include <stdio.h>
#include <stdbool.h>