diff --git a/src/Symfony/Component/Routing/Loader/XmlFileLoader.php b/src/Symfony/Component/Routing/Loader/XmlFileLoader.php
index b5c24f9871..9e219ad37e 100644
--- a/src/Symfony/Component/Routing/Loader/XmlFileLoader.php
+++ b/src/Symfony/Component/Routing/Loader/XmlFileLoader.php
@@ -250,7 +250,7 @@ class XmlFileLoader extends FileLoader
                     $condition = trim($n->textContent);
                     break;
                 default:
-                    throw new \InvalidArgumentException(sprintf('Unknown tag "%s" used in file "%s". Expected "default", "requirement" or "option".', $n->localName, $path));
+                    throw new \InvalidArgumentException(sprintf('Unknown tag "%s" used in file "%s". Expected "default", "requirement", "option" or "condition".', $n->localName, $path));
             }
         }