$OpenBSD: patch-libsparse_output_file_c,v 1.1.1.1 2015/05/28 09:42:37 ajacoutot Exp $
--- libsparse/output_file.c.orig	Mon Feb  9 09:10:55 2015
+++ libsparse/output_file.c	Tue May  5 07:56:50 2015
@@ -41,7 +41,7 @@
 #define ftruncate64 ftruncate
 #endif
 
-#if defined(__APPLE__) && defined(__MACH__)
+#if defined(__OpenBSD__) || defined(__APPLE__) && defined(__MACH__)
 #define lseek64 lseek
 #define ftruncate64 ftruncate
 #define mmap64 mmap