diff --git a/metropolis/proto/api/management.proto b/metropolis/proto/api/management.proto
index 0302a79..30f41c1 100644
--- a/metropolis/proto/api/management.proto
+++ b/metropolis/proto/api/management.proto
@@ -531,7 +531,7 @@
   // if set) into the new config state.
   //
   // Currently, only the following fields can be mutated:
-  //   1. kubernetes_config.node_labels_to_synchronize
+  //   1. kubernetes.node_labels_to_synchronize
   google.protobuf.FieldMask update_mask = 3;
 }