diff --git a/core/modules/content_translation/lib/Drupal/content_translation/Form/TranslatableForm.php b/core/modules/content_translation/lib/Drupal/content_translation/Form/TranslatableForm.php
index b67d430..2759c51 100644
--- a/core/modules/content_translation/lib/Drupal/content_translation/Form/TranslatableForm.php
+++ b/core/modules/content_translation/lib/Drupal/content_translation/Form/TranslatableForm.php
@@ -134,7 +134,7 @@ public function buildForm(array $form, array &$form_state, $entity_type = NULL,
    */
   public function submitForm(array &$form, array &$form_state) {
     // This is the current state that we want to reverse.
-    $translatable = !$this->field->translatable;
+    $translatable = $this->field->translatable;
 
     // If a field is untranslatable, it can have no data except under
     // Language::LANGCODE_NOT_SPECIFIED. Thus we need a field to be translatable