--- a/src/basics.h	Sun Sep 06 20:45:51 2015 +0300
+++ b/src/basics.h	Tue Sep 22 00:59:21 2015 +0300
@@ -74,6 +74,7 @@
 	double	operator[] (Axis ax) const;
 };
 
+unsigned int qHash (const Vertex& vertex);
 Q_DECLARE_METATYPE (Vertex)
 
 //