--- bindings/tk-x-plat/plplotter.c.orig	2012-08-14 00:14:23.000000000 +0200
+++ bindings/tk-x-plat/plplotter.c	2013-10-01 22:42:16.000000000 +0200
@@ -2024,7 +2024,7 @@
 //
 // Results:
 //      The return value is a standard Tcl result.  If TCL_ERROR is
-//      returned, then interp->result contains an error message.
+//      returned, then Tcl_GetStringResult(interp) contains an error message.
 //
 // Side effects:
 //      Configuration information, such as text string, colors, font, etc.