diff --git a/FHEM/73_PRESENCE.pm b/FHEM/73_PRESENCE.pm
index 6daf0f818..0c4135950 100755
--- a/FHEM/73_PRESENCE.pm
+++ b/FHEM/73_PRESENCE.pm
@@ -212,7 +212,7 @@ PRESENCE_Set($@)
 
     return "No Argument given" if(!defined($a[1]));
    
-    my $usage = ($hash->{MODE} ne "lan-bluetooth" ? "Unknown argument ".$a[1].", choose one of statusRequest " : undef);
+    my $usage = (defined($hash->{MODE}) and $hash->{MODE} ne "lan-bluetooth" ? "Unknown argument ".$a[1].", choose one of statusRequest " : undef);
    
     if($a[1] eq "statusRequest")
     {