--- thunar/thunar-file.c	2011-09-20 16:04:56.000000000 -0400
+++ thunar/thunar-file.c	2011-10-10 00:54:59.804339719 -0400
@@ -3168,12 +3168,12 @@
 compare_by_name_using_number (const gchar *ap,
                               const gchar *bp)
 {
-  guint anum;
-  guint bnum;
+  guint64 anum;
+  guint64 bnum;
 
   /* determine the numbers in ap and bp */
-  anum = strtoul (ap, NULL, 10);
-  bnum = strtoul (bp, NULL, 10);
+  anum = g_ascii_strtoull (ap, NULL, 10);
+  bnum = g_ascii_strtoull (bp, NULL, 10);
 
   /* compare the numbers */
   if (anum < bnum)