diff --git a/src/Symfony/Component/Routing/RouteCompiler.php b/src/Symfony/Component/Routing/RouteCompiler.php
index 25e4029f045f3..7ced4b3af8442 100644
--- a/src/Symfony/Component/Routing/RouteCompiler.php
+++ b/src/Symfony/Component/Routing/RouteCompiler.php
@@ -147,7 +147,7 @@ private static function compilePattern(Route $route, $pattern, $isHost)
         }
 
         // find the first optional token
-        $firstOptional = INF;
+        $firstOptional = PHP_INT_MAX;
         if (!$isHost) {
             for ($i = count($tokens) - 1; $i >= 0; $i--) {
                 $token = $tokens[$i];