--- rpl/src/gnuplot.h	2010/09/10 13:41:44	1.13
+++ rpl/src/gnuplot.h	2010/09/23 15:27:36	1.15
@@ -1,6 +1,6 @@
 /*
 ================================================================================
-  RPL/2 (R) version 4.0.19
+  RPL/2 (R) version 4.0.20
   Copyright (C) 1989-2010 Dr. BERTRAND Joël
 
   This file is part of RPL/2.
@@ -31,7 +31,7 @@
 #define ds_gnuplot_commande_trace_2D			"plot"
 #define ds_gnuplot_commande_trace_3D			"splot"
 
-#ifndef OS2
+#ifdef OS2
 #	define ds_gnuplot_terminal_defaut			"set terminal pm"
 #else
 #	define ds_gnuplot_terminal_defaut			"set terminal x11"