Index: configure.in.in
===================================================================
--- configure.in.in	(revision 18955)
+++ configure.in.in	(working copy)
@@ -88,6 +88,11 @@
 AC_SUBST([TDB_U32_TYPE])
 AC_MSG_RESULT([$TDB_U32_TYPE])
 
+dnl ***********************************************
+dnl *** Work-around system-specific limitations ***
+dnl ***********************************************
+AC_SYS_LARGEFILE()
+
 dnl **********************************
 dnl *** Check for standard headers ***
 dnl **********************************
Index: thunar-vfs/thunar-vfs-types.h
===================================================================
--- thunar-vfs/thunar-vfs-types.h	(revision 18955)
+++ thunar-vfs/thunar-vfs-types.h	(working copy)
@@ -24,6 +24,8 @@
 #include <sys/types.h>
 #include <unistd.h>
 
+#include <glib.h>
+
 G_BEGIN_DECLS;
 
 /**
@@ -125,7 +127,7 @@
  * ThunarVfsFileSize:
  * Datatype to represent file sizes (in bytes).
  **/
-typedef off_t ThunarVfsFileSize;
+typedef gint64 ThunarVfsFileSize;
 
 /**
  * ThunarVfsFileTime: