diff --git a/include/ceres/local_parameterization.h b/include/ceres/local_parameterization.h
index 338ab54..a695638 100644
--- a/include/ceres/local_parameterization.h
+++ b/include/ceres/local_parameterization.h
@@ -280,6 +280,8 @@
 // rotation is represented using a quaternion.
 class CERES_EXPORT ProductParameterization : public LocalParameterization {
  public:
+  ProductParameterization(const ProductParameterization&) = delete;
+  ProductParameterization& operator=(const ProductParameterization&) = delete;
   //
   // NOTE: The constructor takes ownership of the input local
   // parameterizations.