diff --git a/cereal/log.capnp b/cereal/log.capnp
index 56af5ae5f..7e47ab171 100644
--- a/cereal/log.capnp
+++ b/cereal/log.capnp
@@ -613,6 +613,11 @@ struct PandaState @0xa7649e2575e4591e {
   voltage @0 :UInt32;
   current @1 :UInt32;
 
+  # these fields are not used by openpilot, but they're
+  # reserved for forks building alternate experiences.
+  controlsAllowedRESERVED1 @38 :Bool;
+  controlsAllowedRESERVED2 @39 :Bool;
+
   enum FaultStatus {
     none @0;
     faultTemp @1;