$OpenBSD$
--- src/sunlink.c.orig	Tue Feb  8 11:45:00 2011
+++ src/sunlink.c	Tue Feb  8 11:45:43 2011
@@ -504,7 +504,7 @@ int sunlink_impl(const char *path, const int options)
 
 #if defined(__linux__)
     srm.buffer_size = fs_stats.f_bsize;
-#elif defined(__FreeBSD__) || defined(__APPLE__)
+#elif defined(__FreeBSD__) || defined(__APPLE__) || defined(__OpenBSD__)
     srm.buffer_size = fs_stats.f_iosize;
 #else
 #error Please define your platform.
