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-rw-r--r--src/comparison.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/comparison.c b/src/comparison.c
index 1d0af9b..009989b 100644
--- a/src/comparison.c
+++ b/src/comparison.c
@@ -16,7 +16,7 @@
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
-#define _XOPEN_SOURCE 500 /* strdup */
+#define _XOPEN_SOURCE 600 /* strdup */
#include <stdlib.h>
#include <string.h>