diff -uNr maxima-5.14.0-orig/src/plot.lisp maxima-5.14.0/src/plot.lisp
--- maxima-5.14.0-orig/src/plot.lisp	2007-12-03 01:21:02 +0300
+++ maxima-5.14.0/src/plot.lisp	2008-01-01 14:45:28 +0300
@@ -54,8 +54,7 @@
                         ;; Controls the number of splittings
                         ;; adaptive-plotting will do.
                         ((mlist) $adapt_depth 10)
-                        ((mlist) $gnuplot_pm3d
-                         ,(if (string= *autoconf-win32* "true") t nil))
+                        ((mlist) $gnuplot_pm3d t)
                         ((mlist) $gnuplot_preamble "")
                         ((mlist) $gnuplot_curve_titles 
                          ((mlist) $default))