diff --git a/koha-tmpl/intranet-tmpl/prog/css/addbiblio.css b/koha-tmpl/intranet-tmpl/prog/css/addbiblio.css
index 862cf98eb4..cd31aead1a 100644
--- a/koha-tmpl/intranet-tmpl/prog/css/addbiblio.css
+++ b/koha-tmpl/intranet-tmpl/prog/css/addbiblio.css
@@ -245,7 +245,7 @@ div.item_edit_form ol li {
 }
 
 .item_edit_form .input_marceditor {
-    flex-basis: 50%;
+    flex-basis: 60%;
     float: none;
 }
 
diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/cataloguing/additem.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/cataloguing/additem.tt
index 32c79d0fa4..cc94134db3 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/cataloguing/additem.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/cataloguing/additem.tt
@@ -46,7 +46,7 @@
     }
 
     .flatpickr_wrapper {
-        flex-basis: 50%;
+        flex-basis: 60%;
     }
 </style>
 </head>