diff --git a/HISTORY b/HISTORY
index e918adf6..7a048cce 100644
--- a/HISTORY
+++ b/HISTORY
@@ -7792,6 +7792,9 @@ Video Disk Recorder Revision History
   Udo Richter).
 - Fixed handling '/' and '~' in recording file names in case DirectoryEncoding is
   used (thanks to Lars Hanisch).
+- Changed cThread::SetIOPriority() from "best effort class" to "idle class" in order to
+  improve overall performance when an editing process is running (thanks to Jochen
+  Dolze).
 
 2013-04-11: Version 2.1.1