1 files changed, 2 insertions, 0 deletions

diff --git a/sudo.h b/sudo.h
index 1fd2ec7d8..9cd46fb68 100644
--- a/sudo.h
+++ b/sudo.h
@@ -251,6 +251,8 @@ extern uid_t timestamp_uid;
 
 extern void (*set_perms) __P((int));
 #endif
+#ifndef errno
 extern int errno;
+#endif
 
 #endif /* _SUDO_SUDO_H */