X-Git-Url: http://wagnertech.de/gitweb/gitweb.cgi/kivitendo-erp.git/blobdiff_plain/fec397bf76c75df4102a45444512572a686cbf24..d32410ac096b:/SL/DB/Unit.pm

diff --git a/SL/DB/Unit.pm b/SL/DB/Unit.pm
index f5f1bc14c..508aa7477 100644
--- a/SL/DB/Unit.pm
+++ b/SL/DB/Unit.pm
@@ -57,7 +57,7 @@ sub convert_to {
   my $my_base_factor    = $self->base_factor       || 1;
   my $other_base_factor = $other_unit->base_factor || 1;
 
-  return $qty * $my_base_factor / $other_base_factor;
+  return ($qty // 0) * $my_base_factor / $other_base_factor;
 }
 
 sub is_time_based {