diff --git a/chrome/content/vimperator/commands.js b/chrome/content/vimperator/commands.js
index c4783a55..9afd66ab 100644
--- a/chrome/content/vimperator/commands.js
+++ b/chrome/content/vimperator/commands.js
@@ -1060,7 +1060,7 @@ function Commands() //{{{
                   "<code class=\"command\">:set option?</code> or <code class=\"command\">:set option</code>(for string and list options) shows the current value of an option.<br/>" +
                   "<code class=\"command\">:set option&amp;</code> resets an option to its default value.<br/>" +
                   "<code class=\"command\">:set option+={value}</code> and <code class=\"command\">:set option-={value}</code> will add/subtract {value} to a number option and append/remove {value} to a string option.<br/>" +
-                  "<code class=\"command\">:set all</code> will show the current value of all options and <code class=\"command\">:set all&</code> will reset all options to their default values.<br/>",
+                  "<code class=\"command\">:set all</code> will show the current value of all options and <code class=\"command\">:set all&amp;</code> will reset all options to their default values.<br/>",
             completer: function(filter) { return vimperator.completion.get_options_completions(filter); }
         }
     ));
diff --git a/chrome/content/vimperator/help.js b/chrome/content/vimperator/help.js
index b969e694..4ac63fba 100644
--- a/chrome/content/vimperator/help.js
+++ b/chrome/content/vimperator/help.js
@@ -61,6 +61,7 @@ vimperator.help = function(section, easter) //{{{
                 //usage = usage.replace(/[^b][^r][^\/]>/g, "&gt;");
                 usage = usage.replace(/</g, "&lt;");
                 usage = usage.replace(/>/g, "&gt;");
+                usage = usage.replace(/&/g, "&amp;");
                 usage = usage.replace(/\\n/g, "<br/>");
                 // color [count], [!], {arg} and [arg] in the usage, not nice and error prone but the regexp work (for now)
                 usage = usage.replace(/({[^}]+})/g, "<span class=\"argument\">$1</span>");                    // required args