diff --git a/selfdrive/boardd/boardd.cc b/selfdrive/boardd/boardd.cc
index 53ec8fb44e..06d7fae5b1 100644
--- a/selfdrive/boardd/boardd.cc
+++ b/selfdrive/boardd/boardd.cc
@@ -78,7 +78,7 @@ bool check_all_connected(const std::vector<Panda *> &pandas) {
   return true;
 }
 
-enum SYNC_TIME_DIR { SYNC_TO_PANDA, SYNC_FROM_PANDA };
+enum class SyncTimeDir { SYNC_TO_PANDA, SYNC_FROM_PANDA };
 
 void sync_time(Panda *panda, SYNC_TIME_DIR dir) {
   if (!panda->has_rtc) return;