diff --git a/fhem/FHEM/57_Calendar.pm b/fhem/FHEM/57_Calendar.pm
index 860365c80..17343f207 100644
--- a/fhem/FHEM/57_Calendar.pm
+++ b/fhem/FHEM/57_Calendar.pm
@@ -14,7 +14,7 @@
 
 use strict;
 use warnings;
-use HttpUtils.pm;
+use HttpUtils;
 
 
 ##############################################