***************
*** 1,3 ****
  #include "linkablemapobj.h"
  #include "branchobj.h"
  #include "mapeditor.h"
--- 1,5 ----
+ #include <math.h>
+ 
  #include "linkablemapobj.h"
  #include "branchobj.h"
  #include "mapeditor.h"