diff --git a/src/Illuminate/Database/Eloquent/Model.php b/src/Illuminate/Database/Eloquent/Model.php
index 7afa5993341..b833e6d6232 100644
--- a/src/Illuminate/Database/Eloquent/Model.php
+++ b/src/Illuminate/Database/Eloquent/Model.php
@@ -1985,20 +1985,16 @@ public function setIncrementing($value)
 
     /**
      * Get the value of the model's primary key.
-     *
-     * @return mixed
      */
-    public function getKey()
+    public function getKey(): int|string
     {
         return $this->getAttribute($this->getKeyName());
     }
 
     /**
      * Get the queueable identity for the entity.
-     *
-     * @return mixed
      */
-    public function getQueueableId()
+    public function getQueueableId(): int|string
     {
         return $this->getKey();
     }