diff --git a/core/modules/field_ui/src/Form/FieldStorageEditForm.php b/core/modules/field_ui/src/Form/FieldStorageEditForm.php
index ff4c76b7fc768a4c7938e02d430036680c90b6f9..a89f0a753257cbe4baedee683040dc0010eadec8 100644
--- a/core/modules/field_ui/src/Form/FieldStorageEditForm.php
+++ b/core/modules/field_ui/src/Form/FieldStorageEditForm.php
@@ -146,6 +146,9 @@ public function buildForm(array $form, FormStateInterface $form_state, FieldConf
         'visible' => array(
          ':input[name="field_storage[cardinality]"]' => array('value' => 'number'),
         ),
+        'disabled' => array(
+         ':input[name="field_storage[cardinality]"]' => array('value' => -1),
+        ),
       ),
     );