diff --git a/library/Icinga/Application/webrouter.php b/library/Icinga/Application/webrouter.php
index 8bcc9124b..04c75515f 100644
--- a/library/Icinga/Application/webrouter.php
+++ b/library/Icinga/Application/webrouter.php
@@ -18,7 +18,7 @@ if (isset($_SERVER['REQUEST_URI'])) {
 
 // Workaround, PHPs internal Webserver seems to mess up SCRIPT_FILENAME
 // as it prefixes it's absolute path with DOCUMENT_ROOT
-if (preg_match('/^PHP .* Development Server/', $_SERVER['SERVER_SOFTWARE'])) {
+if (preg_match('/^PHP.*Development Server/', $_SERVER['SERVER_SOFTWARE'])) {
     $script = basename($_SERVER['SCRIPT_FILENAME']);
     $_SERVER['PHP_SELF'] = $_SERVER['SCRIPT_NAME'] = '/' . $script;
     $_SERVER['SCRIPT_FILENAME'] = $_SERVER['DOCUMENT_ROOT']