--- vym-1.7.0.orig/linkablemapobj.cpp	2005-07-31 19:52:08.000000000 +0200
+++ vym-1.7.0/linkablemapobj.cpp	2005-07-31 19:53:13.000000000 +0200
@@ -1,3 +1,5 @@
+#include <math.h>
+
 #include "linkablemapobj.h"
 #include "branchobj.h"
 #include "mapeditor.h"