--- VTK5.10.1/Common/vtkTcl.h	2012-10-15 22:33:21.000000000 +0200
+++ VTK5.10.1/Common/vtkTcl.h.new	2012-12-22 12:27:56.176482722 +0100
@@ -17,6 +17,10 @@
 
 #include "vtkConfigure.h"
 
+// see http://paraview.org/Bug/view.php?id=11810
+#define USE_INTERP_RESULT
+#define USE_INTERP_ERRORLINE
+
 #ifdef VTK_TCL_TK_STATIC
 # ifndef STATIC_BUILD
 #  define STATIC_BUILD