diff --git a/bsd-compat/bsd-compat.h b/bsd-compat/bsd-compat.h
index 7c5d6c7..a969e07 100644
--- a/bsd-compat/bsd-compat.h
+++ b/bsd-compat/bsd-compat.h
@@ -1,14 +1,24 @@
 #ifndef BSD_COMPAT_H
 #define BSD_COMPAT_H
 
-/*
- * XXX: these end up exported by libsndio, hide them to avoid possible
- * collisions with program functions with the same name.
- */
-
+#ifndef HAVE_ISSETUGID
+#define issetugid _sndio_issetugid
 int issetugid(void);
+#endif
+
+#ifndef HAVE_STRLCAT
+#define strlcat _sndio_strlcat
 size_t strlcat(char *, const char *, size_t);
+#endif
+
+#ifndef HAVE_STRLCPY
+#define strlcpy _sndio_strlcpy
 size_t strlcpy(char *, const char *, size_t);
+#endif
+
+#ifndef HAVE_STRTONUM
+#define strtonum _sndio_strtonum
 long long strtonum(const char *, long long, long long, const char **);
+#endif
 
 #endif /* !defined(BSD_COMPAT_H) */