diff --git a/lib/doc/build.js b/lib/doc/build.js
index 333a64a42..e4057260e 100644
--- a/lib/doc/build.js
+++ b/lib/doc/build.js
@@ -33,7 +33,8 @@ var config = {
 };
 
 function postprocess(string) {
-  return string.replace(/\.(Symbol\.iterator)\b/g, '[$1]');
+  // Fix docdown bug by wrapping symbol property identifiers in brackets.
+  return string.replace(/\.(Symbol\.(?:[a-z]+[A-Z]?)+)/g, '[$1]');
 }
 
 /*----------------------------------------------------------------------------*/