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-rw-r--r--apps/pio_test.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/apps/pio_test.c b/apps/pio_test.c
index 84439ee..f211bf1 100644
--- a/apps/pio_test.c
+++ b/apps/pio_test.c
@@ -1,4 +1,5 @@
#define _BSD_SOURCE
+#define _DEFAULT_SOURCE
#define _POSIX_C_SOURCE 199309L
#include <stdio.h>
#include <stdlib.h>