diff --git a/fhem/FHEM/73_ElectricityCalculator.pm b/fhem/FHEM/73_ElectricityCalculator.pm
index f7e7ce41a..7df85bba4 100644
--- a/fhem/FHEM/73_ElectricityCalculator.pm
+++ b/fhem/FHEM/73_ElectricityCalculator.pm
@@ -54,6 +54,7 @@ use strict;
 use warnings;
 use Time::Local;
 use FHEM::Meta;
+use Data::Dumper;
 my %ElectricityCalculator_gets;
 my %EolectricityCalculator_sets;