diff --git a/lib/docparser.js b/lib/docparser.js
index b75266c5..2f966e9d 100644
--- a/lib/docparser.js
+++ b/lib/docparser.js
@@ -64,7 +64,7 @@ YUI.add('docparser', function (Y) {
 
         REGEX_TYPE = /(.*?)\{(.*?)\}(.*)/,
         REGEX_FIRSTWORD = /^\s*?([^\s]+)(.*)/,
-        REGEX_OPTIONAL = /\[(.*?)\]/,
+        REGEX_OPTIONAL = /^\[(.*)\]$/,
         REGEX_START_COMMENT = {
             js: /^\s*\/\*\*/,
             coffee: /^\s*###\*/