diff --git a/src/Entity/PathautoPattern.php b/src/Entity/PathautoPattern.php
index 4f56a46..9e3ab34 100644
--- a/src/Entity/PathautoPattern.php
+++ b/src/Entity/PathautoPattern.php
@@ -111,7 +111,7 @@ class PathautoPattern extends ConfigEntityBase implements PathautoPatternInterfa
   /**
    * @var array[]
    *   Keys are context tokens, and values are arrays with the following keys:
-   *   - label (string, optional): The human-readable label of this
+   *   - label (string|null, optional): The human-readable label of this
    *     relationship.
    */
   protected $relationships = [];
diff --git a/src/PathautoPatternInterface.php b/src/PathautoPatternInterface.php
index ed0c7d4..8bc5f0c 100644
--- a/src/PathautoPatternInterface.php
+++ b/src/PathautoPatternInterface.php
@@ -122,7 +122,7 @@ interface PathautoPatternInterface extends ConfigEntityInterface {
    *
    * @return array[]
    *   Keys are context tokens, and values are arrays with the following keys:
-   *   - label (string, optional): The human-readable label of this
+   *   - label (string|null, optional): The human-readable label of this
    *     relationship.
    */
   public function getRelationships();