diff --git a/selfdrive/ui/ui.cc b/selfdrive/ui/ui.cc
index 3dab4f4245..f9b4f2eee7 100644
--- a/selfdrive/ui/ui.cc
+++ b/selfdrive/ui/ui.cc
@@ -85,7 +85,7 @@ static void update_line_data(const UIState *s, const cereal::ModelDataV2::XYZTDa
     v += calib_frame_to_full_frame(s, line_x[i], line_y[i] + y_off, line_z[i] + z_off, v);
   }
   pvd->cnt = v - pvd->v;
-  assert(pvd->cnt < std::size(pvd->v));
+  assert(pvd->cnt <= std::size(pvd->v));
 }
 
 static void update_model(UIState *s, const cereal::ModelDataV2::Reader &model) {