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 7d966bee25..a41569fe99 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/cataloguing/additem.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/cataloguing/additem.tt
@@ -39,6 +39,15 @@
     <script>
         var has_item_groups = "[% item_groups.size | html %]";
     </script>
+    <style>
+        .flatpickr_wrapper input {
+            width: 100%;
+        }
+
+        .flatpickr_wrapper {
+            flex-basis: 50%;
+        }
+    </style>
 </head>
 
 <body id="cat_additem" class="cat">