diff --git a/ceilometer/agent/single.yml b/ceilometer/agent/single.yml
index ebb1d60..0b0bbc3 100644
--- a/ceilometer/agent/single.yml
+++ b/ceilometer/agent/single.yml
@@ -1,2 +1,7 @@
 classes:
 - service.ceilometer.agent.single
+parameters:
+  ceilometer:
+    agent:
+      identity:
+        protocol: ${_param:internal_protocol}