--- skencil-0.6.17/Pax/paxmodule.c.orig	2014-09-26 22:52:15.875429070 +0200
+++ skencil-0.6.17/Pax/paxmodule.c	2014-09-26 22:51:29.252433084 +0200
@@ -9,7 +9,7 @@
    8.4 and earlier versions. Once Tcl releases before 8.4 don't need to
    be supported anymore, this should go. */
 #define USE_COMPAT_CONST
-
+#define USE_INTERP_RESULT
 #include <tcl.h>
 #include <tk.h>
 
--- skencil-0.6.17/Pax/paxtkinter.c.orig	2014-09-26 22:55:23.146412948 +0200
+++ skencil-0.6.17/Pax/paxtkinter.c	2014-09-26 22:55:59.533409815 +0200
@@ -108,7 +108,7 @@
    8.4 and earlier versions. Once Tcl releases before 8.4 don't need to
    be supported anymore, this should go. */
 #define USE_COMPAT_CONST
-
+#define USE_INTERP_RESULT 1
 #include <tcl.h>
 #include <tk.h>