diff -up acct-6.5.1/configure.pom acct-6.5.1/configure
--- acct-6.5.1/configure.pom	2009-09-06 20:06:58.000000000 +0200
+++ acct-6.5.1/configure	2009-12-21 15:24:37.000000000 +0100
@@ -3684,12 +3684,12 @@ fi
 { $as_echo "$as_me:$LINENO: result: $ac_cv_prog_cc_g" >&5
 $as_echo "$ac_cv_prog_cc_g" >&6; }
 if test "$ac_test_CFLAGS" = set; then
-  CFLAGS=$ac_save_CFLAGS
+  CFLAGS="$ac_save_CFLAGS  -D_FILE_OFFSET_BITS=64"
 elif test $ac_cv_prog_cc_g = yes; then
   if test "$GCC" = yes; then
-    CFLAGS="-g -O2"
+    CFLAGS="-g -O2  -D_FILE_OFFSET_BITS=64"
   else
-    CFLAGS="-g"
+    CFLAGS="-g  -D_FILE_OFFSET_BITS=64"
   fi
 else
   if test "$GCC" = yes; then
diff -up acct-6.5.1/file_rd.c.pom acct-6.5.1/file_rd.c
--- acct-6.5.1/file_rd.c.pom	2009-09-06 01:39:50.000000000 +0200
+++ acct-6.5.1/file_rd.c	2009-12-21 15:26:30.000000000 +0100
@@ -7,6 +7,9 @@
 
 #include "config.h"
 
+#define _LARGEFILE_SOURCE 1
+#define _FILE_OFFSET_BITS 64
+
 #include <stdio.h>
 
 #ifdef HAVE_STRING_H
@@ -103,9 +106,9 @@ char *file_reader_get_entry(struct file_
 
           if (fri->backwards)
             {
-              long offset, max_recs, recs_to_read;
+              off_t offset, max_recs, recs_to_read;
 
-              if ((offset = ftell (fri->fp)) <= 0)
+              if ((offset = ftello (fri->fp)) <= 0)
                 goto no_more_records;
 
               /* Read as many records as possible, up to
@@ -124,8 +127,8 @@ char *file_reader_get_entry(struct file_
 
               if (debugging_enabled)
                 {
-                  long new_offset = ftell (fri->fp);
-                  fprintf (stddebug, "Did seek in file %ld --> %ld\n",
+                  off_t new_offset = ftello (fri->fp);
+                  fprintf (stddebug, "Did seek in file %lld --> %lld\n",
                            offset, new_offset);
                 }
 
@@ -134,7 +137,7 @@ char *file_reader_get_entry(struct file_
                 fatal ("get_entry: couldn't read from file");
 
               if (debugging_enabled)
-                fprintf (stddebug, "Got %ld records from file\n",
+                fprintf (stddebug, "Got %lld records from file\n",
                          recs_to_read);
 
               /* don't need to check this, because the above read was fine */
diff -up acct-6.5.1/file_rd.h.pom acct-6.5.1/file_rd.h
--- acct-6.5.1/file_rd.h.pom	2009-09-05 03:15:49.000000000 +0200
+++ acct-6.5.1/file_rd.h	2009-12-21 15:27:24.000000000 +0100
@@ -4,6 +4,8 @@
  * record-oriented files.
  *
  */
+#define __USE_XOPEN
+#include <unistd.h>
 
 struct file_list
 {
@@ -19,9 +21,9 @@ struct file_rd_info
 				   because we close files as soon as
 				   we find their ends and free their
 				   entries from the linked list */
-    int recs_read;		/* how many records are in our buffer? */
-    int recs_left;		/* how many records are left in the
-				   buffer to be used? */
+    off_t recs_read;		/* how many records are in our buffer? */
+    off_t recs_left;		/* how many records are left in the
+				buffer to be used? */
     void *buffer;			/* the buffer for the data */
     int buffered_records;		/* how many records to buffer */
     int record_size;		/* how big is each record? */