diff --git a/FHEM/10_MQTT2_DEVICE.pm b/FHEM/10_MQTT2_DEVICE.pm
index c9121ef04..6d8730936 100644
--- a/FHEM/10_MQTT2_DEVICE.pm
+++ b/FHEM/10_MQTT2_DEVICE.pm
@@ -474,6 +474,10 @@ MQTT2_DEVICE_Attr($$)
       return "$dev attr $attrName: more parameters needed" if(!$par2);
 
       if($atype eq "reading") {
+        $par1 =~ s/\$[a-z0-9_]+/\.\*/gi;
+        eval { "Hallo" =~ m/^$par1$/ };
+        return "Bad regexp in $dev readingList: $@" if($@);
+
         if($par2 =~ m/^{.*}\s*$/) {
           my %v = ("%TOPIC"=>1, "%EVENT"=>"0 1 2 3 4 5 6 7 8 9",
                  "%NAME"=>$dev, "%CID"=>"clientId", "%JSONMAP"=>"");
diff --git a/FHEM/91_notify.pm b/FHEM/91_notify.pm
index 34cb050c1..fdf5377b4 100644
--- a/FHEM/91_notify.pm
+++ b/FHEM/91_notify.pm
@@ -55,7 +55,7 @@ notify_Define($$)
   # Checking for misleading regexps
   return "Bad regexp: starting with *" if($re =~ m/^\*/);
   eval { "Hallo" =~ m/^$re$/ };
-  return "Bad regexp: $@" if($@);
+  return "Bad regexp in $name definition: $@" if($@);
   $hash->{REGEXP} = $re;
   my %specials= (
     "%NAME" => $name,