diff --git a/metropolis/proto/private/private.proto b/metropolis/proto/private/private.proto
index 9bae680..a09b0d3 100644
--- a/metropolis/proto/private/private.proto
+++ b/metropolis/proto/private/private.proto
@@ -19,6 +19,7 @@
 package metropolis.proto.private;
 
 // Node describes a single node's state in etcd
+// DEPRECATED: this will be moved to //metropolis/node/curator.
 message Node {
     // Node's public key..
     bytes public_key = 1;