diff --git a/plugins/modules/gcp_serviceusage_service.py b/plugins/modules/gcp_serviceusage_service.py
index 221f7b6c..40a10cd2 100644
--- a/plugins/modules/gcp_serviceusage_service.py
+++ b/plugins/modules/gcp_serviceusage_service.py
@@ -103,6 +103,8 @@ options:
     type: str
 notes:
 - 'Getting Started: U(https://cloud.google.com/service-usage/docs/getting-started)'
+- For this module to work, the serviceusage.googleapis.com service must be enabled
+  U(https://cloud.google.com/service-usage/docs/enable-disable#gcloud) already.
 - for authentication, you can set service_account_file using the C(GCP_SERVICE_ACCOUNT_FILE)
   env variable.
 - for authentication, you can set service_account_contents using the C(GCP_SERVICE_ACCOUNT_CONTENTS)