diff --git a/core/modules/taxonomy/src/Entity/Vocabulary.php b/core/modules/taxonomy/src/Entity/Vocabulary.php
index 1c05388..01ba59f 100644
--- a/core/modules/taxonomy/src/Entity/Vocabulary.php
+++ b/core/modules/taxonomy/src/Entity/Vocabulary.php
@@ -126,7 +126,15 @@ public function getDescription() {
    * {@inheritdoc}
    */
   public function getWeight() {
-    return $this->weight;
+    return $this->get('weight')->value;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setWeight($weight) {
+    $this->set('weight', $weight);
+    return $this;
   }
 
   /**
diff --git a/core/modules/taxonomy/src/VocabularyInterface.php b/core/modules/taxonomy/src/VocabularyInterface.php
index 557457f..c917d96 100644
--- a/core/modules/taxonomy/src/VocabularyInterface.php
+++ b/core/modules/taxonomy/src/VocabularyInterface.php
@@ -45,6 +45,16 @@ public function setHierarchy($hierarchy);
   public function getWeight();
 
   /**
+   * Gets the weight of vocabulary.
+   *
+   * @param int $weight
+   *   The vocabulary weight.
+   *
+   * @return $this
+   */
+  public function setWeight($weight);
+
+  /**
    * Returns the vocabulary description.
    *
    * @return string