diff --git a/Doc/Devel/tree.html b/Doc/Devel/tree.html
index 64d9d197d..43ad191f6 100644
--- a/Doc/Devel/tree.html
+++ b/Doc/Devel/tree.html
@@ -218,10 +218,10 @@ The following functions are used to help debug SWIG parse trees.
 <blockquote>
 Prints the tag-structure of the parse tree to standard output.  <tt>node</tt> is the top-level parse tree node.  <tt>prefix</tt> is
 a string prefix thats added to the start of each line.  Normally, you would specify the empty string or NIL for <tt>prefix</tt>.  
-This function is called by the <tt>-dump_tags</tt> option to SWIG.
+This function is called by the <tt>-debug-tags</tt> option to SWIG.
 
 <pre>
-% swig -dump_tags -python example.i
+% swig -debug-tags -python example.i
  . top (:1)
  . top . include (/Users/beazley/Projects/share/swig/1.3.31/swig.swg:0)
  . top . include . include (/Users/beazley/Projects/share/swig/1.3.31/swigwarnings.swg:0)
@@ -243,7 +243,7 @@ Since many language modules include hundreds of typemaps and other information,
 
 <blockquote>
 Prints the contents of a parse tree node, including all children, to standard output.  The output includes all attributes
-and other details.  The command line option <tt>-dump_tree</tt> produces output generated by this function.
+and other details.
 </blockquote>
 
 <p>
@@ -251,8 +251,8 @@ and other details.  The command line option <tt>-dump_tree</tt> produces output
 
 <blockquote>
 Prints the same output as <tt>Swig_print_node()</tt> except that it also processes all of the siblings of <tt>node</tt>.  This can
-be used to dump the entire parse tree to standard output.  Use the command line option <tt>-dump_tree</tt> to get
-the output of this function for a SWIG input file.
+be used to dump the entire parse tree to standard output.  The command line options <tt>-debug-module</tt> 
+and <tt>-debug-top</tt> use this function to display the parse tree for a SWIG input file.
 </blockquote>