diff --git a/internal/ceres/levenberg_marquardt_strategy.cc b/internal/ceres/levenberg_marquardt_strategy.cc
index 576648a..af76c42 100644
--- a/internal/ceres/levenberg_marquardt_strategy.cc
+++ b/internal/ceres/levenberg_marquardt_strategy.cc
@@ -61,7 +61,7 @@
 LevenbergMarquardtStrategy::~LevenbergMarquardtStrategy() {
 }
 
-LinearSolver::Summary LevenbergMarquardtStrategy::ComputeStep(
+TrustRegionStrategy::Summary LevenbergMarquardtStrategy::ComputeStep(
     const TrustRegionStrategy::PerSolveOptions& per_solve_options,
     SparseMatrix* jacobian,
     const double* residuals,
@@ -113,7 +113,12 @@
   }
 
   reuse_diagonal_ = true;
-  return linear_solver_summary;
+
+  TrustRegionStrategy::Summary summary;
+  summary.residual_norm = linear_solver_summary.residual_norm;
+  summary.num_iterations = linear_solver_summary.num_iterations;
+  summary.termination_type = linear_solver_summary.termination_type;
+  return summary;
 }
 
 void LevenbergMarquardtStrategy::StepAccepted(double step_quality) {