diff --git a/fhem/CHANGED b/fhem/CHANGED
index 764fd9e3b..1977037f7 100644
--- a/fhem/CHANGED
+++ b/fhem/CHANGED
@@ -500,3 +500,4 @@
   - feature: holiday module + doc + example + holiday2we attribute
   - bugfix:  sunrise stuff fixed, doc missing
   - feature: CUL FHT sending added
+  - bugfix:  workaround to make M232 counter wraparound
diff --git a/fhem/HISTORY b/fhem/HISTORY
index cc4fda954..6aef3979d 100644
--- a/fhem/HISTORY
+++ b/fhem/HISTORY
@@ -400,3 +400,6 @@
 - Sat May 30 2009 (Rudi)
   - 99_SUNRISE_EL: sunrise/sunset called in "at" computes correctly the next
     event. New "sunrise()/sunset()" calls added, min max optional parameter.
+
+- Sun May 31 2009 (Boris)
+  - 81_M232Counter.pm: counter stops at 65536; workaround makes counter wraparound