diff --git a/pmc/include/drawable.h b/pmc/include/drawable.h
--- a/pmc/include/drawable.h
+++ b/pmc/include/drawable.h
@@ -16,6 +16,7 @@
 
   public:
     virtual ~ Drawable () { };
+
     virtual void move (algebra::Vector) = 0;
     virtual void show () = 0;
 };