1 files changed, 4 insertions, 0 deletions

diff --git a/helper.h b/helper.h
index 0e53fac43..68e0a8530 100644
--- a/helper.h
+++ b/helper.h
@@ -47,4 +47,8 @@ void arc4random_stir(void);
 void setproctitle(const char *fmt, ...);
 #endif /* !HAVE_SETPROCTITLE */
 
+#ifndef HAVE_SETENV
+int setenv(const char *name, const char *value, int overwrite);
+#endif /* !HAVE_SETENV */
+
 #endif /* _HELPER_H */