diff --git a/pmc/include/cube.h b/pmc/include/cube.h
--- a/pmc/include/cube.h
+++ b/pmc/include/cube.h
@@ -19,8 +19,9 @@
     Cube (Surface *, algebra::Vector &, algebra::Vector &, algebra::Vector &, algebra::Vector &, int);
     Cube (Surface *, algebra::Vector[4], int);
     Cube (Surface *);
+    Cube (const Cube &);
+    virtual ~ Cube ();
 
-    virtual ~ Cube ();
     void show ();
     void move (algebra::Vector);
 };