diff --git a/internal/ceres/schur_complement_solver.cc b/internal/ceres/schur_complement_solver.cc
index 866fd67..90e1d51 100644
--- a/internal/ceres/schur_complement_solver.cc
+++ b/internal/ceres/schur_complement_solver.cc
@@ -1,5 +1,5 @@
 // Ceres Solver - A fast non-linear least squares minimizer
-// Copyright 2015 Google Inc. All rights reserved.
+// Copyright 2022 Google Inc. All rights reserved.
 // http://ceres-solver.org/
 //
 // Redistribution and use in source and binary forms, with or without
@@ -173,6 +173,12 @@
 
   return summary;
 }
+DenseSchurComplementSolver::DenseSchurComplementSolver(
+    const LinearSolver::Options& options)
+    : SchurComplementSolver(options),
+      cholesky_(DenseCholesky::Create(options)) {}
+
+DenseSchurComplementSolver::~DenseSchurComplementSolver() {}
 
 // Initialize a BlockRandomAccessDenseMatrix to store the Schur
 // complement.
diff --git a/internal/ceres/schur_complement_solver.h b/internal/ceres/schur_complement_solver.h
index 60af043..dac5545 100644
--- a/internal/ceres/schur_complement_solver.h
+++ b/internal/ceres/schur_complement_solver.h
@@ -121,7 +121,7 @@
   void operator=(const SchurComplementSolver&) = delete;
 
   // LinearSolver methods
-  virtual ~SchurComplementSolver() {}
+  ~SchurComplementSolver() override;
   LinearSolver::Summary SolveImpl(
       BlockSparseMatrix* A,
       const double* b,
@@ -154,13 +154,11 @@
 // Dense Cholesky factorization based solver.
 class DenseSchurComplementSolver : public SchurComplementSolver {
  public:
-  explicit DenseSchurComplementSolver(const LinearSolver::Options& options)
-      : SchurComplementSolver(options),
-        cholesky_(DenseCholesky::Create(options)) {}
+  explicit DenseSchurComplementSolver(const LinearSolver::Options& options);
   DenseSchurComplementSolver(const DenseSchurComplementSolver&) = delete;
   void operator=(const DenseSchurComplementSolver&) = delete;
 
-  virtual ~DenseSchurComplementSolver() {}
+  ~DenseSchurComplementSolver() override;
 
  private:
   void InitStorage(const CompressedRowBlockStructure* bs) final;