diff --git a/plugins/modules/gcp_compute_region_backend_service.py b/plugins/modules/gcp_compute_region_backend_service.py
index 1d00e0b..14a3472 100644
--- a/plugins/modules/gcp_compute_region_backend_service.py
+++ b/plugins/modules/gcp_compute_region_backend_service.py
@@ -349,7 +349,7 @@ options:
     - Indicates what kind of load balancing this regional backend service will be
       used for. A backend service created for one type of load balancing cannot be
       used with the other(s).
-    - 'Some valid choices include: "INTERNAL", "INTERNAL_MANAGED"'
+    - 'Some valid choices include: "EXTERNAL", "INTERNAL", "INTERNAL_MANAGED"'
     required: false
     default: INTERNAL
     type: str