diff --git a/fhem/FHEM/74_THINKINGCLEANER.pm b/fhem/FHEM/74_THINKINGCLEANER.pm
index 020f3feb1..979ddc2b0 100644
--- a/fhem/FHEM/74_THINKINGCLEANER.pm
+++ b/fhem/FHEM/74_THINKINGCLEANER.pm
@@ -57,7 +57,7 @@ sub THINKINGCLEANER_Initialize($) {
     $hash->{parseParams} = 1;
 
     $hash->{AttrList} =
-"disable:0,1 timeout:1,2,3,4,5 pollInterval:30,45,60,75,90 pollMultiplierWebhook pollMultiplierCleaning model webhookHttpHostname webhookPort webhookFWinstance:$webhookFWinstance restart:noArg"
+"disable:0,1 timeout:1,2,3,4,5 pollInterval:30,45,60,75,90 pollMultiplierWebhook pollMultiplierCleaning model webhookHttpHostname webhookPort webhookFWinstance:$webhookFWinstance restart:noArg "
       . $readingFnAttributes;
 
     return;