diff --git a/header.php b/header.php
index d20ce2e..ff59e66 100644
--- a/header.php
+++ b/header.php
@@ -95,7 +95,7 @@ $j(function()
 			showUrlModal(window.location.origin + tmp[1]);
 		}
 	
-	var modal_match = Array(/^http:\/\/<?php echo home_url() ?>\/.+/);
+	var modal_match = Array(/^http:\/\/<?php echo preg_quote(home_url()) ?>\/.+/);
 	
 	var modal_not_match = Array(/wp-admin/);