diff --git a/src/Symfony/Component/DomCrawler/FormFieldRegistry.php b/src/Symfony/Component/DomCrawler/FormFieldRegistry.php
index edb2788910de2..97bdacd6bf2fa 100644
--- a/src/Symfony/Component/DomCrawler/FormFieldRegistry.php
+++ b/src/Symfony/Component/DomCrawler/FormFieldRegistry.php
@@ -207,16 +207,17 @@ private function getSegments($name)
         if (preg_match('/^(?P<base>[^[]+)(?P<extra>(\[.*)|$)/', $name, $m)) {
             $segments = array($m['base']);
             while (!empty($m['extra'])) {
-                if (preg_match('/^\[(?P<segment>.*?)\](?P<extra>.*)$/', $m['extra'], $m)) {
+                $extra = $m['extra'];
+                if (preg_match('/^\[(?P<segment>.*?)\](?P<extra>.*)$/', $extra, $m)) {
                     $segments[] = $m['segment'];
                 } else {
-                    throw new \InvalidArgumentException(sprintf('Malformed field path "%s"', $name));
+                    $segments[] = $extra;
                 }
             }
 
             return $segments;
         }
 
-        throw new \InvalidArgumentException(sprintf('Malformed field path "%s"', $name));
+        return [$name];
     }
 }