diff --git a/fhem/contrib/HMCCU/88_HMCCUDEV.pm b/fhem/contrib/HMCCU/88_HMCCUDEV.pm
index b59be03fa..b4da57b9b 100644
--- a/fhem/contrib/HMCCU/88_HMCCUDEV.pm
+++ b/fhem/contrib/HMCCU/88_HMCCUDEV.pm
@@ -42,6 +42,8 @@ use warnings;
 use SetExtensions;
 # use Data::Dumper;
 
+use Time::HiRes;
+
 sub HMCCUDEV_Define ($@);
 sub HMCCUDEV_Set ($@);
 sub HMCCUDEV_Get ($@);