diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/acqui/invoices.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/acqui/invoices.tt
index d60e6943f2..f189ba2b5b 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/acqui/invoices.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/acqui/invoices.tt
@@ -531,6 +531,7 @@
             }
 
             $("#supplierid").kohaSelect({
+                width: '100%',
                 allowClear: true,
                 ajax: {
                     url: '/api/v1/acquisitions/vendors',