diff --git a/src/tl/tl/tlEventsVar.h b/src/tl/tl/tlEventsVar.h
index d84e90c84..4470c83f8 100644
--- a/src/tl/tl/tlEventsVar.h
+++ b/src/tl/tl/tlEventsVar.h
@@ -52,6 +52,12 @@ public:
     //  .. nothing yet ..
   }
 
+  event_function (const event_function &other)
+    : m_m (other.m_m)
+  {
+    //  .. nothing yet ..
+  }
+
   virtual void call (_JOIN(tl::Object *object, _CALLARGLIST))
   {
     T *t = dynamic_cast<T *> (object);
@@ -81,6 +87,12 @@ public:
     //  .. nothing yet ..
   }
 
+  event_function_with_data (const event_function_with_data &other)
+    : m_m (other.m_m), m_d (other.m_d)
+  {
+    //  .. nothing yet ..
+  }
+
   virtual void call (_JOIN(tl::Object *object, _CALLARGLIST))
   {
     T *t = dynamic_cast<T *> (object);
@@ -111,6 +123,12 @@ public:
     //  .. nothing yet ..
   }
 
+  generic_event_function (const generic_event_function &other)
+    : m_m (other.m_m)
+  {
+    //  .. nothing yet ..
+  }
+
   virtual void call (_JOIN(tl::Object *object, _CALLARGLIST))
   {
     T *t = dynamic_cast<T *> (object);
@@ -141,6 +159,12 @@ public:
     //  .. nothing yet ..
   }
 
+  generic_event_function_with_data (const generic_event_function_with_data &other)
+    : m_m (other.m_m), m_d (other.m_d)
+  {
+    //  .. nothing yet ..
+  }
+
   virtual void call (_JOIN(tl::Object *object, _CALLARGLIST))
   {
     T *t = dynamic_cast<T *> (object);