diff --git a/compat.h b/compat.h
index 13334ad7..be726831 100644
--- a/compat.h
+++ b/compat.h
@@ -334,6 +334,11 @@ char		*strndup(const char *, size_t);
 void		*memmem(const void *, size_t, const void *, size_t);
 #endif
 
+#ifndef HAVE_GETPEEREID
+/* getpeereid.c */
+int		getpeereid(int, uid_t *, gid_t *);
+#endif
+
 #ifndef HAVE_DAEMON
 /* daemon.c */
 int	 	 daemon(int, int);