diff --git a/lib/rdoc/generator/darkfish.rb b/lib/rdoc/generator/darkfish.rb
index 26f545b14b..8b314e0ab3 100644
--- a/lib/rdoc/generator/darkfish.rb
+++ b/lib/rdoc/generator/darkfish.rb
@@ -196,6 +196,9 @@ def write_style_sheet
     options = { :verbose => $DEBUG_RDOC, :noop => @dry_run }
 
     FileUtils.cp @template_dir + 'rdoc.css', '.', options
+    @options.template_stylesheets.each do |stylesheet|
+      FileUtils.cp stylesheet, '.', options
+    end
 
     Dir[(@template_dir + "{js,images}/**/*").to_s].each do |path|
       next if File.directory? path
diff --git a/lib/rdoc/generator/template/darkfish/_head.rhtml b/lib/rdoc/generator/template/darkfish/_head.rhtml
index f3d82a37f6..2993f9265a 100644
--- a/lib/rdoc/generator/template/darkfish/_head.rhtml
+++ b/lib/rdoc/generator/template/darkfish/_head.rhtml
@@ -3,6 +3,11 @@
 <title><%= h @title %></title>
 
 <link type="text/css" media="screen" href="<%= asset_rel_prefix %>/rdoc.css" rel="stylesheet">
+<% if @options.template_stylesheets.flatten.any? %>
+  <% @options.template_stylesheets.flatten.each do |stylesheet| %>
+    <link type="text/css" href="<%= asset_rel_prefix %>/<%= File.basename stylesheet %>" rel="stylesheet">
+  <% end %>
+<% end %>
 
 <script type="text/javascript">
   var rdoc_rel_prefix = "<%= rel_prefix %>/";
diff --git a/lib/rdoc/options.rb b/lib/rdoc/options.rb
index 984ae1a0fd..67a31544a6 100644
--- a/lib/rdoc/options.rb
+++ b/lib/rdoc/options.rb
@@ -288,6 +288,11 @@ class RDoc::Options
 
   attr_accessor :template_dir
 
+  ##
+  # Additional template stylesheets
+
+  attr_accessor :template_stylesheets
+
   ##
   # Documentation title
 
@@ -345,6 +350,7 @@ def init_ivars # :nodoc:
     @tab_width = 8
     @template = nil
     @template_dir = nil
+    @template_stylesheets = []
     @title = nil
     @update_output_dir = true
     @verbosity = 1
@@ -873,6 +879,14 @@ def parse argv
 
       opt.separator nil
 
+      opt.on("--template-stylesheets=FILES", PathArray,
+             "Set (or add to) the list of files to",
+             "include with the html template.") do |value|
+        @template_stylesheets << value
+      end
+
+      opt.separator nil
+
       opt.on("--title=TITLE", "-t",
              "Set TITLE as the title for HTML output.") do |value|
         @title = value