diff --git a/src/cpp/base.h b/src/cpp/base.h
index 8bd209f6..c3c9fed7 100644
--- a/src/cpp/base.h
+++ b/src/cpp/base.h
@@ -155,7 +155,9 @@ namespace statiskit
 
     struct STATISKIT_CORE_API Schedule
     {
+        Schedule(const Schedule& schedule) = default;
         virtual ~Schedule() = 0;
+        
         virtual double operator() (const double& stage) const = 0;
 
         virtual std::unique_ptr< Schedule > copy() const = 0;