diff --git a/src/lib/nodes_to_host.js b/src/lib/nodes_to_host.js
index d6a6226e9..abcb48e79 100644
--- a/src/lib/nodes_to_host.js
+++ b/src/lib/nodes_to_host.js
@@ -1,5 +1,5 @@
 var _ = require('./utils');
-var extractHostPartsRE = /\[\/*([^:]+):(\d+)\]/;
+var extractHostPartsRE = /^([\.:0-9a-f]*):([0-9]+)?$/;
 
 function makeNodeParser(hostProp) {
   return function (nodes) {