diff --git a/internal/ceres/solver_impl.h b/internal/ceres/solver_impl.h
index dd40e41..09141ae 100644
--- a/internal/ceres/solver_impl.h
+++ b/internal/ceres/solver_impl.h
@@ -126,6 +126,12 @@
   static bool IsParameterBlockSetIndependent(
       const set<double*>& parameter_block_ptrs,
       const vector<ResidualBlock*>& residual_blocks);
+
+  static CoordinateDescentMinimizer* CreateInnerIterationMinimizer(
+      const Solver::Options& options,
+      const Program& program,
+      const ProblemImpl::ParameterMap& parameter_map,
+      string* error);
 };
 
 }  // namespace internal