diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index c657573f..f6401ede 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -274,6 +274,7 @@ Artur Skawina <skawina@geocities.com>
  for pointing out a problem with the ERR macro defined by ncurses.h
  for a patch that contained a fix for checking toFile in cCuttingThread::Action()
  for improving cUnbufferedFile
+ for fixing calculating the cache size in cUnbufferedFile::Read()
 
 Werner Fink <werner@suse.de>
  for making I/O more robust by handling EINTR
diff --git a/HISTORY b/HISTORY
index 57ea3c35..54bfa482 100644
--- a/HISTORY
+++ b/HISTORY
@@ -4716,7 +4716,7 @@ Video Disk Recorder Revision History
 - Fixed automatically updating the CAM menu in case the whole operation (for
   instance a firmware update) takes longer than the menu timeout.
 
-2006-05-25: Version 1.4.0-2
+2006-05-26: Version 1.4.0-2
 
 - Removed leftover LSMOD=... line from 'runvdr'.
 - Modified the Makefile to copy additional libraries a plugin might provide (suggested
@@ -4734,3 +4734,4 @@ Video Disk Recorder Revision History
 - Fixed handling the running status of EPG events in case the "Schedule" menu is
   currently open (i.e. a write lock on the schedules data can't be achieved).
 - Fixed handling VPS timers in case the EPG event hasn't been 'seen' in a while.
+- Fixed calculating the cache size in cUnbufferedFile::Read() (thanks to Artur Skawina).
diff --git a/tools.c b/tools.c
index 53523fa0..475afdb8 100644
--- a/tools.c
+++ b/tools.c
@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: tools.c 1.117 2006/04/21 15:12:47 kls Exp $
+ * $Id: tools.c 1.118 2006/05/26 10:10:31 kls Exp $
  */
 
 #include "tools.h"
@@ -1179,7 +1179,7 @@ ssize_t cUnbufferedFile::Read(void *Data, size_t Size)
            }
         else if (cachedend > ahead && cachedend - curpos > READCHUNK * 2) {
            // current position has moved back enough, shrink head window.
-           FadviseDrop(curpos + READCHUNK, cachedend - curpos + READCHUNK);
+           FadviseDrop(curpos + READCHUNK, cachedend - (curpos + READCHUNK));
            cachedend = curpos + READCHUNK;
            }
         }