diff --git a/fhem/FHEM/10_CUL_HM.pm b/fhem/FHEM/10_CUL_HM.pm
index d57d3b3a0..8de73720f 100755
--- a/fhem/FHEM/10_CUL_HM.pm
+++ b/fhem/FHEM/10_CUL_HM.pm
@@ -105,7 +105,7 @@ my %culHmModel=(
   "004E" => "HM-LC-DDC1-PCB",
   "004F" => "HM-SEN-MDIR-SM",
   "0050" => "HM-SEC-SFA-SM",
-  "0051" => "HM-LC-SW1-PB-FM",
+  "0051" => "HM-LC-SW1-PB-FM", # tested by Zrrrronggg!
   "0052" => "HM-LC-SW2-PB-FM", # Tested
   "0053" => "HM-LC-BL1-PB-FM", # Tested by ruebezahl (2011-09-22)
   "0056" => "HM-CC-SCD",