diff --git a/lib/ansible/plugins/doc_fragments/gcp.py b/lib/ansible/plugins/doc_fragments/gcp.py
index a73389921b4..308d48808b7 100644
--- a/lib/ansible/plugins/doc_fragments/gcp.py
+++ b/lib/ansible/plugins/doc_fragments/gcp.py
@@ -35,6 +35,7 @@ options:
         description:
             - Array of scopes to be used.
         type: list
+        elements: str
     env_type:
         description:
             - Specifies which Ansible environment you're running this module within.