diff --git a/src/ajax.js b/src/ajax.js
index 2c61cf27..ce27d2de 100644
--- a/src/ajax.js
+++ b/src/ajax.js
@@ -15,7 +15,7 @@ var r20 = /%20/g,
 	rselectTextarea = /^(?:select|textarea)/i,
 	rspacesAjax = /\s+/,
 	rts = /([?&])_=[^&]*/,
-	rurl = /^(\w+:)\/\/([^\/?#:]*)(?::(\d+))?/,
+	rurl = /^([\w\+\.\-]+:)\/\/([^\/?#:]*)(?::(\d+))?/,
 
 	// Keep a copy of the old load method
 	_load = jQuery.fn.load,