1 files changed, 1 insertions, 1 deletions
diff --git a/extern/ceres/internal/ceres/schur_eliminator.h b/extern/ceres/internal/ceres/schur_eliminator.h
index 66fcb4d58e8..42c016ee9b0 100644
--- a/extern/ceres/internal/ceres/schur_eliminator.h
+++ b/extern/ceres/internal/ceres/schur_eliminator.h
@@ -164,7 +164,7 @@ namespace internal {
 // 2008 for an example of such use].
 //
 // Example usage: Please see schur_complement_solver.cc
-class SchurEliminatorBase {
+class CERES_EXPORT_INTERNAL SchurEliminatorBase {
  public:
   virtual ~SchurEliminatorBase() {}