diff --git a/selfdrive/boardd/panda_comms.h b/selfdrive/boardd/panda_comms.h
index 506b96b372..f93d292170 100644
--- a/selfdrive/boardd/panda_comms.h
+++ b/selfdrive/boardd/panda_comms.h
@@ -1,8 +1,9 @@
 #pragma once
 
-#include <mutex>
 #include <atomic>
 #include <cstdint>
+#include <mutex>
+#include <string>
 #include <vector>
 
 #ifndef __APPLE__