diff --git a/cataloguing/addbiblio.pl b/cataloguing/addbiblio.pl
index 090849da4d..036764417c 100755
--- a/cataloguing/addbiblio.pl
+++ b/cataloguing/addbiblio.pl
@@ -592,7 +592,7 @@ sub build_tabs {
                     }
 
                     # now, loop again to add parameter subfield that are not in the MARC::Record
-                    foreach my $subfield ( keys %{ $tagslib->{$tag} } )
+                    foreach my $subfield ( sort( keys %{ $tagslib->{$tag} } ) )
                     {
                         next if ( length $subfield != 1 );
                         next if ( $tagslib->{$tag}->{$subfield}->{tab} ne $tabloop );