diff --git a/spice.proto b/spice.proto
index 78c1fad..266e03a 100644
--- a/spice.proto
+++ b/spice.proto
@@ -219,6 +219,8 @@ channel MainChannel : BaseChannel {
       uint8 *cert_subject_data[cert_subject_size] @zero_terminated  @marshall;
     } @ctype(SpiceMsgMainMigrationSwitchHost) migrate_switch_host;
 
+    Empty migrate_end;
+
  client:
     message {
 	uint64 cache_size;
@@ -243,6 +245,8 @@ channel MainChannel : BaseChannel {
     message {
         uint32 num_tokens;
     } @ctype(SpiceMsgcMainAgentTokens) agent_token;
+
+    Empty migrate_end;
 };
 
 enum8 clip_type {