diff --git a/src/Symfony/Component/HttpFoundation/Request.php b/src/Symfony/Component/HttpFoundation/Request.php
index fc26304ad2..38b7fc2169 100644
--- a/src/Symfony/Component/HttpFoundation/Request.php
+++ b/src/Symfony/Component/HttpFoundation/Request.php
@@ -1037,8 +1037,8 @@ class Request
             $pos = strrpos($host, ':');
         }
 
-        if (false !== $pos && !empty(substr($host, $pos + 1))) {
-            return (int) substr($host, $pos + 1);
+        if (false !== $pos && '' !== $port = substr($host, $pos + 1)) {
+            return (int) $port;
         }
 
         return 'https' === $this->getScheme() ? 443 : 80;