--- lib/rdoc/options.rb~	2007-02-13 00:01:19.000000000 +0100
+++ lib/rdoc/options.rb	2007-04-21 22:22:02.000000000 +0200
@@ -550,7 +550,7 @@
     ver = nil
     IO.popen("dot -V 2>&1") do |io|
       ver = io.read
-      if ver =~ /dot\s+version(?:\s+gviz)?\s+(\d+)\.(\d+)/
+      if ver =~ /dot\s.*version(?:\s+gviz)?\s+(\d+)\.(\d+)/
         ok = ($1.to_i > 1) || ($1.to_i == 1 && $2.to_i >= 8)
       end
     end