diff --git a/ChangeLog b/ChangeLog
index 92b18ccc..faf1547a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -19,6 +19,7 @@ NEW integration of a few external musrfit plug-ins into the standard build proce
 NEW default estimates for 'data' and 'background' entries in RUN blocks
 NEW directory with some msr- and data-files for quick testing of new musrfit installations
 NEW option to musrt0: the key 'T' will set the t0 cursor to the maximum of the histogram
+FIXED y-unzoom failure for musrt0 (MUSR-77)
 FIXED fitting issue for boundaries none/none (MUSR-136)
 FIXED formatting of the ASCII fit output file for long parameter names (MUSR-142)
 FIXED time window frame bug in musrview (MUSR-138)
@@ -45,6 +46,8 @@ FIXED warning messages
 FIXED db data tag reading error
 FIXED usage of BOOST >= 1.38.0
 FIXED the extraction of the time resolution for the mud data format, since MUD_getHistFsPerBin seems sometimes to return just crap.
+CHANGED in root-5.27.04 the zooming/unzooming handling was modified which forced me to add some more code for 
+        proper zooming/unzooming via 'u' key
 CHANGED write the ROOT histogram of the correlation matrix to the output file as well as not only the graph
 CHANGED allow case insensitive 'run' as first entry in a runlist-file as input to msr2data
 CHANGED [MUSRGUI/MUSREDIT] '(Un)comment' is splitted into 'Comment' and 'Uncomment'