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-rw-r--r--lib/libcqrlogo.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/libcqrlogo.h b/lib/libcqrlogo.h
index 59ee885..0a8429b 100644
--- a/lib/libcqrlogo.h
+++ b/lib/libcqrlogo.h
@@ -8,6 +8,8 @@
#ifndef _LIBCQRLOGO_H
#define _LIBCQRLOGO_H
+#define _GNU_SOURCE
+
#include <stdio.h>
#include <stdlib.h>
#include <string.h>