diff --git a/acqui/addorderiso2709.pl b/acqui/addorderiso2709.pl
index 49ee926044..10522a94e3 100755
--- a/acqui/addorderiso2709.pl
+++ b/acqui/addorderiso2709.pl
@@ -245,7 +245,7 @@ if ($op eq ""){
                 $budget_hash->{$budget_codes[$i]}->{quantity} += 1;
                 $budget_hash->{$budget_codes[$i]}->{price} = $itemprices[$i];
                 $budget_hash->{$budget_codes[$i]}->{itemnumbers} //= [];
-                push( $budget_hash->{$budget_codes[$i]}->{itemnumbers}, $itemnumbers[$i] );
+                push @{ $budget_hash->{$budget_codes[$i]}->{itemnumbers} }, $itemnumbers[$i];
             }
 
             # Create orderlines from MarcItemFieldsToOrder