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-rw-r--r--src/libbiguint/bu_addc.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/libbiguint/bu_addc.c b/src/libbiguint/bu_addc.c
index 0a57531..cccc7a8 100644
--- a/src/libbiguint/bu_addc.c
+++ b/src/libbiguint/bu_addc.c
@@ -1,7 +1,9 @@
/* ISC license. */
/* OpenBSD needs that for EOVERFLOW. wtfbsdseriously */
+#ifndef _BSD_SOURCE
#define _BSD_SOURCE
+#endif
#include <errno.h>
#include <skalibs/uint32.h>