diff --git a/django/contrib/admin/static/admin/css/autocomplete.css b/django/contrib/admin/static/admin/css/autocomplete.css
index 69c94e7347..7478c2c4e6 100644
--- a/django/contrib/admin/static/admin/css/autocomplete.css
+++ b/django/contrib/admin/static/admin/css/autocomplete.css
@@ -273,3 +273,7 @@ select.admin-autocomplete {
     display: block;
     padding: 6px;
 }
+
+.errors .select2-selection {
+    border: 1px solid var(--error-fg);
+}