diff -uNr maxima-5.9.2-orig/src/plot.lisp maxima-5.9.2/src/plot.lisp
--- maxima-5.9.2-orig/src/plot.lisp	2005-09-25 23:38:48 +0400
+++ maxima-5.9.2/src/plot.lisp	2005-10-12 16:05:10 +0400
@@ -51,7 +51,7 @@
 			;; 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))