diff --git a/fhem/CHANGED b/fhem/CHANGED
index ddcc29f96..8783b2dff 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.
+  - update:  88_HMCCU: Optimized reading update performance
   - feature: 00_SONOS: New lists for groupinformations
   - bugfix:  88_HMCCU: Fixed toggle function for HMCCUCHN devices
   - change:  93_DbLog: new version 2.14.4, new set-commands exportCache, 
diff --git a/fhem/FHEM/88_HMCCU.pm b/fhem/FHEM/88_HMCCU.pm
index 0c1a46ab1..5ef7b7e87 100755
--- a/fhem/FHEM/88_HMCCU.pm
+++ b/fhem/FHEM/88_HMCCU.pm
@@ -4,7 +4,7 @@
 #
 #  $Id$
 #
-#  Version 3.9.012
+#  Version 3.9.013
 #
 #  Module for communication between FHEM and Homematic CCU2.
 #  Supports BidCos-RF, BidCos-Wired, HmIP-RF, virtual CCU channels,
@@ -101,7 +101,7 @@ my %HMCCU_CUST_CHN_DEFAULTS;
 my %HMCCU_CUST_DEV_DEFAULTS;
 
 # HMCCU version
-my $HMCCU_VERSION = '3.9.012';
+my $HMCCU_VERSION = '3.9.013';
 
 # RPC Ports and URL extensions
 my %HMCCU_RPC_NUMPORT = (
@@ -2203,9 +2203,9 @@ sub HMCCU_UpdateSingleDevice ($$$)
 
 	# Check for updated data
  	my ($devaddr, $cnum) = HMCCU_SplitChnAddr ($clthash->{ccuaddr});
-# 	return 0 if (!exists ($objects->{$devaddr}));
-# 	return 0 if ($clttype eq 'HMCUCCHN' && !exists ($objects->{$devaddr}{$cnum}) &&
-# 		!exists ($objects->{$devaddr}{0}));
+ 	return 0 if (!exists ($objects->{$devaddr}));
+ 	return 0 if ($clttype eq 'HMCUCCHN' && !exists ($objects->{$devaddr}{$cnum}) &&
+ 		!exists ($objects->{$devaddr}{0}));
 
 	# Get attributes of IO device
 	my $ccuflags = AttrVal ($ccuname, 'ccuflags', 'null');