diff --git a/fhem/FHEM/36_JeeLink.pm b/fhem/FHEM/36_JeeLink.pm
index 5969056a4..6300d1451 100644
--- a/fhem/FHEM/36_JeeLink.pm
+++ b/fhem/FHEM/36_JeeLink.pm
@@ -148,7 +148,7 @@ JeeLink_Set($@)
     JeeLink_SimpleWrite($hash, $arg);
 
   } elsif( $cmd eq "LaCrossePairForSec" ) {
-    return "Usage: set $name LaCrossePairForSec <seconds_active> [ignore_battery]" if(!$arg || $arg !~ m/^\d+$/ || $arg2 ne "ignore_battery");
+    return "Usage: set $name LaCrossePairForSec <seconds_active> [ignore_battery]" if(!$arg || $arg !~ m/^\d+$/ || ($arg2 && $arg2 ne "ignore_battery") );
     $hash->{LaCrossePair} = $arg2?2:1; 
     InternalTimer(gettimeofday()+$arg, "JeeLink_RemoveLaCrossePair", $hash, 1);
 
diff --git a/fhem/FHEM/36_LaCrosse.pm b/fhem/FHEM/36_LaCrosse.pm
index 53b387b30..c44826a97 100644
--- a/fhem/FHEM/36_LaCrosse.pm
+++ b/fhem/FHEM/36_LaCrosse.pm
@@ -133,10 +133,9 @@ LaCrosse_Parse($$)
   if( !$modules{LaCrosse}{defptr}{$raddr} ) {
     Log3 $name, 3, "LaCrosse Unknown device $rname, please define it";
 
-    my $iohash = $rhash->{IODev};
-    return undef if( !$iohash->{LaCrossePair} );
+    return undef if( !$hash->{LaCrossePair} );
 
-    return "UNDEFINED LaCrosse_$rname LaCrosse $raddr" if( $battery_new || $iohash->{LaCrossePair} == 2 );
+    return "UNDEFINED LaCrosse_$rname LaCrosse $raddr" if( $battery_new || $hash->{LaCrossePair} == 2 );
     return undef;
   }