diff --git a/src/ReceiveCommands.cc b/src/ReceiveCommands.cc
index bcf128e4..658abc95 100644
--- a/src/ReceiveCommands.cc
+++ b/src/ReceiveCommands.cc
@@ -85,6 +85,7 @@ void process_connect(std::shared_ptr<ServerState> s, std::shared_ptr<Client> c)
 
     case ServerBehavior::PATCH_SERVER_BB:
       c->flags |= Client::Flag::BB_PATCH;
+      [[fallthrough]];
     case ServerBehavior::PATCH_SERVER_PC:
     case ServerBehavior::DATA_SERVER_BB:
     case ServerBehavior::LOBBY_SERVER: