diff --git a/fhem/CHANGED b/fhem/CHANGED
index c40b1c30c..494a7516e 100644
--- a/fhem/CHANGED
+++ b/fhem/CHANGED
@@ -1,5 +1,6 @@
 # Add changes at the top of the list. Keep it in ASCII, and 80-char wide.
 # Do not insert empty lines here, update check depends on it.
+  - changed: 89_HEATRONIC.pm: calculation of sol_Tcollector changed
   - feature: # comments in fhem.cfg are only removed at the line-start
   - feature: set command modifyTimeSpec for at, to be used in webCmd
   - added:   New module 71_PHILIPS_AUDIO.pm for Philips MCi, Streamium and