omit accept header in ping operation
diff --git a/openstack/cdn/v1/base/requests.go b/openstack/cdn/v1/base/requests.go
index d63522b..9d8632c 100644
--- a/openstack/cdn/v1/base/requests.go
+++ b/openstack/cdn/v1/base/requests.go
@@ -24,6 +24,7 @@
 	_, res.Err = perigee.Request("GET", pingURL(c), perigee.Options{
 		MoreHeaders: c.AuthenticatedHeaders(),
 		OkCodes:     []int{204},
+		OmitAccept:  true,
 	})
 	return res
 }