diff --git a/pb/rpc.proto b/pb/rpc.proto
index 2cca477..e602b88 100644
--- a/pb/rpc.proto
+++ b/pb/rpc.proto
@@ -47,7 +47,6 @@ message ControlPrune {
 	optional string topicID = 1;
 }
 
-// topicID = hash(topicDescriptor); (not the topic.name)
 message TopicDescriptor {
 	optional string name = 1;
 	optional AuthOpts auth = 2;