diff --git a/y2019/vision/global_calibration.cc b/y2019/vision/global_calibration.cc
index ac559b0..e2c4490 100644
--- a/y2019/vision/global_calibration.cc
+++ b/y2019/vision/global_calibration.cc
@@ -198,7 +198,7 @@
         const ::aos::vision::Vector<2> target_point = target_value[j];
 
         // Now build up the residual block.
-        auto ftor = [template_point, target_point, i](
+        auto ftor = [template_point, target_point](
             const double *const intrinsics, const double *const extrinsics,
             double *residual) {
           const IntrinsicParams intrinsic_params =