1 files changed, 5 insertions, 4 deletions
diff --git a/extern/ceres/internal/ceres/dogleg_strategy.h b/extern/ceres/internal/ceres/dogleg_strategy.h
index 1150940efd3..cc3778ea2a0 100644
--- a/extern/ceres/internal/ceres/dogleg_strategy.h
+++ b/extern/ceres/internal/ceres/dogleg_strategy.h
@@ -31,6 +31,7 @@
 #ifndef CERES_INTERNAL_DOGLEG_STRATEGY_H_
 #define CERES_INTERNAL_DOGLEG_STRATEGY_H_
 
+#include "ceres/internal/port.h"
 #include "ceres/linear_solver.h"
 #include "ceres/trust_region_strategy.h"
 
@@ -52,16 +53,16 @@ namespace internal {
 // DoglegStrategy follows the approach by Shultz, Schnabel, Byrd.
 // This finds the exact optimum over the two-dimensional subspace
 // spanned by the two Dogleg vectors.
-class DoglegStrategy : public TrustRegionStrategy {
+class CERES_EXPORT_INTERNAL DoglegStrategy : public TrustRegionStrategy {
  public:
   explicit DoglegStrategy(const TrustRegionStrategy::Options& options);
   virtual ~DoglegStrategy() {}
 
   // TrustRegionStrategy interface
   Summary ComputeStep(const PerSolveOptions& per_solve_options,
-                              SparseMatrix* jacobian,
-                              const double* residuals,
-                              double* step) final;
+                      SparseMatrix* jacobian,
+                      const double* residuals,
+                      double* step) final;
   void StepAccepted(double step_quality) final;
   void StepRejected(double step_quality) final;
   void StepIsInvalid();