diff --git a/fhem/contrib/HMCCU/FHEM/88_HMCCU.pm b/fhem/contrib/HMCCU/FHEM/88_HMCCU.pm
index 10e93b599..82add6bc2 100644
--- a/fhem/contrib/HMCCU/FHEM/88_HMCCU.pm
+++ b/fhem/contrib/HMCCU/FHEM/88_HMCCU.pm
@@ -62,6 +62,8 @@
 
 package main;
 
+no if $] >= 5.017011, warnings => 'experimental::smartmatch';
+
 use strict;
 use warnings;
 use SetExtensions;