diff --git a/Modules/nismodule.c b/Modules/nismodule.c
index 9c1cd00..9fbab5a 100644
--- a/Modules/nismodule.c
+++ b/Modules/nismodule.c
@@ -89,7 +89,7 @@
 	return map;
 }
 
-#ifdef __APPLE__
+#if defined(__APPLE__) || defined(__OpenBSD__) || defined(__FreeBSD__)
 typedef int (*foreachfunc)(unsigned long, char *, int, char *, int, void *);
 #else
 typedef int (*foreachfunc)(int, char *, int, char *, int, char *);