diff --git a/selfdrive/ui/qt/widgets/cameraview.h b/selfdrive/ui/qt/widgets/cameraview.h
index 016522b05c..081483b649 100644
--- a/selfdrive/ui/qt/widgets/cameraview.h
+++ b/selfdrive/ui/qt/widgets/cameraview.h
@@ -78,7 +78,7 @@ protected:
 
   std::deque<std::pair<uint32_t, VisionBuf*>> frames;
   uint32_t draw_frame_id = 0;
-  int prev_frame_id = 0;
+  uint32_t prev_frame_id = 0;
 
 protected slots:
   void vipcConnected(VisionIpcClient *vipc_client);