1 files changed, 2 insertions, 3 deletions
diff --git a/extern/ceres/include/ceres/iteration_callback.h b/extern/ceres/include/ceres/iteration_callback.h
index 4507fdf748c..3d7e8e94f30 100644
--- a/extern/ceres/include/ceres/iteration_callback.h
+++ b/extern/ceres/include/ceres/iteration_callback.h
@@ -36,6 +36,7 @@
 #define CERES_PUBLIC_ITERATION_CALLBACK_H_
 
 #include "ceres/internal/disable_warnings.h"
+#include "ceres/internal/export.h"
 #include "ceres/types.h"
 
 namespace ceres {
@@ -164,8 +165,6 @@ struct CERES_EXPORT IterationSummary {
 //     explicit LoggingCallback(bool log_to_stdout)
 //         : log_to_stdout_(log_to_stdout) {}
 //
-//     ~LoggingCallback() {}
-//
 //     CallbackReturnType operator()(const IterationSummary& summary) {
 //       const char* kReportRowFormat =
 //           "% 4d: f:% 8e d:% 3.2e g:% 3.2e h:% 3.2e "
@@ -194,7 +193,7 @@ struct CERES_EXPORT IterationSummary {
 //
 class CERES_EXPORT IterationCallback {
  public:
-  virtual ~IterationCallback() {}
+  virtual ~IterationCallback();
   virtual CallbackReturnType operator()(const IterationSummary& summary) = 0;
 };