diff --git a/src/Sequence.h b/src/Sequence.h
index 09c74745a..5c2cdc0b7 100644
--- a/src/Sequence.h
+++ b/src/Sequence.h
@@ -73,6 +73,10 @@ class PROFILE_DLL_API Sequence final : public XMLTagHandler{
    // from one project to another...
    Sequence(const Sequence &orig, const std::shared_ptr<DirManager> &projDirManager);
 
+   // Sequence cannot be copied without specifying a DirManager
+   Sequence(const Sequence&) PROHIBITED;
+   Sequence& operator= (const Sequence&) PROHIBITED;
+
    ~Sequence();
 
    //