diff --git a/C4/Acquisition.pm b/C4/Acquisition.pm
index de85953e89..6a8df0280a 100644
--- a/C4/Acquisition.pm
+++ b/C4/Acquisition.pm
@@ -1893,7 +1893,6 @@ cancelled.
 
 sub DelOrder {
     my ( $bibnum, $ordernumber, $delete_biblio, $reason ) = @_;
-
     my $error;
     my $dbh = C4::Context->dbh;
     my $query = "
diff --git a/Koha/Acquisition/Invoice/Adjustment.pm b/Koha/Acquisition/Invoice/Adjustment.pm
index e3d0bc206c..4d87a94ad9 100644
--- a/Koha/Acquisition/Invoice/Adjustment.pm
+++ b/Koha/Acquisition/Invoice/Adjustment.pm
@@ -20,6 +20,7 @@ use Modern::Perl;
 use Carp;
 
 use Koha::Database;
+use Koha::Acquisition::Invoice;
 
 use base qw(Koha::Object);
 
@@ -33,6 +34,20 @@ Koha::Acquisition::Invoice::Adjustment - Koha Invoice Adjustment class
 
 =cut
 
+=head3 invoice
+
+my $invoice = $adjustment->invoice;
+
+Return the invoice for this adjustment
+
+=cut
+
+sub invoice {
+    my ( $self ) = @_;
+    my $invoice_rs = $self->_result->invoiceid;
+    return Koha::Acquisition::Invoice->_new_from_dbic( $invoice_rs );
+}
+
 =head3 type
 
 =cut
diff --git a/acqui/ordered.pl b/acqui/ordered.pl
index 09fd607eba..ebf89e86d0 100755
--- a/acqui/ordered.pl
+++ b/acqui/ordered.pl
@@ -107,7 +107,7 @@ while ( my $data = $sth->fetchrow_hashref ) {
     }
 }
 
-my $adjustments = Koha::Acquisition::Invoice::Adjustments->search({budget_id => $fund_id, closedate => undef, encumber_open => 1 }, { join => 'invoiceid' } );
+my $adjustments = Koha::Acquisition::Invoice::Adjustments->search({budget_id => $fund_id, closedate => undef, encumber_open => 1 }, { prefetch => 'invoiceid' } );
 while ( my $adj = $adjustments->next ){
     $total += $adj->adjustment;
 }
diff --git a/acqui/spent.pl b/acqui/spent.pl
index 75b495b78d..20d2b13c0c 100755
--- a/acqui/spent.pl
+++ b/acqui/spent.pl
@@ -135,7 +135,7 @@ while (my $data = $sth->fetchrow_hashref) {
 }
 $sth->finish;
 
-my $adjustments = Koha::Acquisition::Invoice::Adjustments->search({budget_id => $bookfund, closedate => { '!=' => undef } }, { join => 'invoiceid' } );
+my $adjustments = Koha::Acquisition::Invoice::Adjustments->search({budget_id => $bookfund, closedate => { '!=' => undef } }, { prefetch => 'invoiceid' },  );
 while ( my $adj = $adjustments->next ){
     $total += $adj->adjustment;
 }
diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/acqui/ordered.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/acqui/ordered.tt
index 6e20dfb250..5685d7e07f 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/acqui/ordered.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/acqui/ordered.tt
@@ -77,7 +77,11 @@
             [% FOREACH adjustment IN adjustments %]
                 <tr>
                     <td></td>
-                    <td colspan="6">Adjustment cost for invoice [% adjustment.invoiceid | html %]</td>
+                    <td colspan="6">Adjustment cost for invoice
+                        <a href="/cgi-bin/koha/acqui/invoice.pl?invoiceid=[% adjustment.invoiceid | uri %]">
+                            [% adjustment.invoice.invoicenumber | html %]
+                        </a>
+                    </td>
                     <td class="data total">[% adjustment.adjustment | $Price %]</td>
                 </tr>
             [% END %]
diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/acqui/spent.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/acqui/spent.tt
index 78cf32e573..2e5ca3f830 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/acqui/spent.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/acqui/spent.tt
@@ -87,7 +87,11 @@
             [% FOREACH shipmentcost IN shipmentcosts %]
                 <tr>
                     <td></td>
-                    <td colspan="8">Shipping cost for invoice [% shipmentcost.invoicenumber | html %]</td>
+                    <td colspan="8">Shipping cost for invoice
+                        <a href="/cgi-bin/koha/acqui/invoice.pl?invoiceid=[% shipmentcode.invoiceid | uri %]">
+                             [% shipmentcost.invoicenumber | html %]
+                        </a>
+                    </td>
                     <td class="data total">[% shipmentcost.shipmentcost | $Price %]</td>
                 </tr>
             [% END %]
@@ -96,7 +100,11 @@
             [% FOREACH adjustment IN adjustments %]
                 <tr>
                     <td></td>
-                    <td colspan="8">Adjustment cost for invoice [% adjustment.invoiceid | html %]</td>
+                    <td colspan="8">Adjustment cost for invoice
+                        <a href="/cgi-bin/koha/acqui/invoice.pl?invoiceid=[% adjustment.invoiceid | uri %]">
+                            [% adjustment.invoice.invoicenumber | html %]
+                        </a>
+                    </td>
                     <td class="data total">[% adjustment.adjustment | $Price %]</td>
                 </tr>
             [% END %]
diff --git a/t/db_dependent/Koha/Acquisition/Invoice/Adjustments.t b/t/db_dependent/Koha/Acquisition/Invoice/Adjustments.t
index 4c970e2dbf..d5e2309eb0 100644
--- a/t/db_dependent/Koha/Acquisition/Invoice/Adjustments.t
+++ b/t/db_dependent/Koha/Acquisition/Invoice/Adjustments.t
@@ -19,7 +19,7 @@
 
 use Modern::Perl;
 
-use Test::More tests => 6;
+use Test::More tests => 7;
 
 use Koha::Database;
 
@@ -64,4 +64,12 @@ is( $retrieved_adj->reason, $new_adj->reason, 'Find an adjustment by id should r
 $retrieved_adj->delete;
 is( Koha::Acquisition::Invoice::Adjustments->search->count, $nb_of_adjs + 1, 'Delete should have deleted the adjustment' );
 
+subtest 'invoice' => sub {
+    plan tests => 2;
+
+    my $invoice = $retrieved_adj->invoice;
+    is( ref( $invoice ), 'Koha::Acquisition::Invoice', 'Koha::Acquisition::Invoice::Adjustment->invoice should return a Koha::Acquisition::Invoice' );
+    is( $invoice->invoiceid, $retrieved_adj->invoiceid, 'Koha::Acquisition::Invoice::Adjustment->invoice should return the correct invoice' );
+};
+
 $schema->storage->txn_rollback;