diff --git a/src/Generator/Stubs/model.stub b/src/Generator/Stubs/model.stub
index 308e85ed2..3f719410f 100644
--- a/src/Generator/Stubs/model.stub
+++ b/src/Generator/Stubs/model.stub
@@ -9,5 +9,5 @@ class {{class-name}} extends ParentModel
     /**
      * A resource key to be used in the serialized responses.
      */
-    protected string $resourceKey = '{{resource-key}}';
+    protected $resourceKey = '{{resource-key}}';
 }