diff --git a/pkg/kv/kvserver/kvserverpb/raft.proto b/pkg/kv/kvserver/kvserverpb/raft.proto
index 93728ea2e689..df251e0fdccc 100644
--- a/pkg/kv/kvserver/kvserverpb/raft.proto
+++ b/pkg/kv/kvserver/kvserverpb/raft.proto
@@ -96,10 +96,14 @@ message RaftMessageRequest {
   // that were admitted below raft.
   repeated kv.kvserver.kvflowcontrol.kvflowcontrolpb.AdmittedRaftLogEntries admitted_raft_log_entries = 11 [(gogoproto.nullable) = false];
 
-  // LowPriorityOverride is used in RACv2, and is only set if Message is a
-  // MsgApp. When true, it specifies that the priority of the Entries in the
-  // Message are overridden to be raftpb.LowPri.
-  bool low_priority_override = 12;
+  // UsingRAC2Protocol is set to true iff the leader is using the RACv2
+  // protocol.
+  bool using_rac2_protocol = 12;
+  // LowPriorityOverride is read only when UsingRAC2Protocol is true, and is
+  // set only if Message is a MsgApp. When true, it specifies that the
+  // priority of the Entries in the Message are overridden to be
+  // raftpb.LowPri.
+  bool low_priority_override = 13;
   reserved 10;
 }