diff --git a/modules/google-backend/module-google-backend.c b/modules/google-backend/module-google-backend.c
index 9b49a5b..9582494 100644
--- a/modules/google-backend/module-google-backend.c
+++ b/modules/google-backend/module-google-backend.c
@@ -52,18 +52,6 @@
 #define GOOGLE_SMTP_PORT		587
 #define GOOGLE_SMTP_SECURITY_METHOD	METHOD (STARTTLS_ON_STANDARD_PORT)
 
-/* Calendar Configuration Details */
-#define GOOGLE_CALENDAR_BACKEND_NAME	"caldav"
-#define GOOGLE_CALENDAR_RESOURCE_ID	"Calendar"
-
-/* CalDAV v1 Configuration Details */
-#define GOOGLE_CALDAV_V1_HOST		"www.google.com"
-#define GOOGLE_CALDAV_V1_PATH		"/calendar/dav/%s/events"
-
-/* CalDAV v2 Configuration Details */
-#define GOOGLE_CALDAV_V2_HOST		"apidata.googleusercontent.com"
-#define GOOGLE_CALDAV_V2_PATH		"/caldav/v2/%s/events"
-
 /* Contacts Configuration Details */
 #define GOOGLE_CONTACTS_BACKEND_NAME	"google"
 #define GOOGLE_CONTACTS_HOST		"www.google.com"
@@ -412,7 +580,7 @@ google_backend_dup_resource_id (ECollectionBackend *backend,
 
 	extension_name = E_SOURCE_EXTENSION_CALENDAR;
 	if (e_source_has_extension (child_source, extension_name))
-		return g_strdup (GOOGLE_CALENDAR_RESOURCE_ID);
+		return E_COLLECTION_BACKEND_CLASS (e_google_backend_parent_class)->dup_resource_id (backend, child_source);
 
 	extension_name = E_SOURCE_EXTENSION_TASK_LIST;
 	if (e_source_has_extension (child_source, extension_name))
