diff --git a/pmc/include/rectangle.h b/pmc/include/rectangle.h
--- a/pmc/include/rectangle.h
+++ b/pmc/include/rectangle.h
@@ -12,13 +12,14 @@
 
 class Rectangle:public Drawable {
   private:
-    Vector * P[4];
+    algebra::Vector * P[4];
 
   public:
-    Rectangle (Surface *, Vector& p1, Vector& p2, Vector& p3, Vector& p4);
+    Rectangle (Surface *, algebra::Vector & p1, algebra::Vector & p2, algebra::Vector & p3, algebra::Vector & p4);
+    Rectangle (Surface *, algebra::Vector[4]);
     Rectangle (Surface *);
     virtual ~ Rectangle ();
-    void move (Vector);
+    void move (algebra::Vector);
     void show ();
 };
 #endif