diff --git a/internal/ceres/schur_complement_solver.cc b/internal/ceres/schur_complement_solver.cc
index 90e1d51..b342051 100644
--- a/internal/ceres/schur_complement_solver.cc
+++ b/internal/ceres/schur_complement_solver.cc
@@ -114,6 +114,16 @@
 
 }  // namespace
 
+SchurComplementSolver::SchurComplementSolver(
+    const LinearSolver::Options& options)
+    : options_(options) {
+  CHECK_GT(options.elimination_groups.size(), 1);
+  CHECK_GT(options.elimination_groups[0], 0);
+  CHECK(options.context != NULL);
+}
+
+SchurComplementSolver::~SchurComplementSolver() {}
+
 LinearSolver::Summary SchurComplementSolver::SolveImpl(
     BlockSparseMatrix* A,
     const double* b,
diff --git a/internal/ceres/schur_complement_solver.h b/internal/ceres/schur_complement_solver.h
index dac5545..8b07042 100644
--- a/internal/ceres/schur_complement_solver.h
+++ b/internal/ceres/schur_complement_solver.h
@@ -111,16 +111,10 @@
 class CERES_EXPORT_INTERNAL SchurComplementSolver
     : public BlockSparseMatrixSolver {
  public:
-  explicit SchurComplementSolver(const LinearSolver::Options& options)
-      : options_(options) {
-    CHECK_GT(options.elimination_groups.size(), 1);
-    CHECK_GT(options.elimination_groups[0], 0);
-    CHECK(options.context != NULL);
-  }
+  explicit SchurComplementSolver(const LinearSolver::Options& options);
   SchurComplementSolver(const SchurComplementSolver&) = delete;
   void operator=(const SchurComplementSolver&) = delete;
 
-  // LinearSolver methods
   ~SchurComplementSolver() override;
   LinearSolver::Summary SolveImpl(
       BlockSparseMatrix* A,