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-rw-r--r--extension/revtwoway.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/extension/revtwoway.c b/extension/revtwoway.c
index 13f0e778..062a178e 100644
--- a/extension/revtwoway.c
+++ b/extension/revtwoway.c
@@ -31,6 +31,8 @@
#include <config.h>
#endif
+#define _BSD_SOURCE
+
#include <stdio.h>
#include <stdlib.h>
#include <string.h>