Index: libgrive/src/util/OS.hh
--- libgrive/src/util/OS.hh.orig
+++ libgrive/src/util/OS.hh
@@ -31,6 +31,8 @@ class Path ;
 
 enum FileType { FT_FILE = 1, FT_DIR = 2, FT_UNKNOWN = 3 } ;
 
+#define off64_t off_t
+
 namespace os
 {
 	struct Error : virtual Exception {} ;