--- source/blender/blenlib/BLI_filereader.h.orig	Thu Mar  3 11:48:02 2022
+++ source/blender/blenlib/BLI_filereader.h	Thu Mar  3 11:48:30 2022
@@ -33,7 +33,7 @@
 #include "BLI_compiler_attrs.h"
 #include "BLI_utildefines.h"
 
-#if defined(_MSC_VER) || defined(__APPLE__) || defined(__HAIKU__) || defined(__NetBSD__)
+#if defined(_MSC_VER) || defined(__APPLE__) || defined(__HAIKU__) || defined(__NetBSD__) || defined(__OpenBSD__)
 typedef int64_t off64_t;
 #endif
 
