diff --git a/src/Symfony/Component/CssSelector/Parser/Tokenizer/TokenizerPatterns.php b/src/Symfony/Component/CssSelector/Parser/Tokenizer/TokenizerPatterns.php
index b548905fa29c..15dfb0eb0e78 100644
--- a/src/Symfony/Component/CssSelector/Parser/Tokenizer/TokenizerPatterns.php
+++ b/src/Symfony/Component/CssSelector/Parser/Tokenizer/TokenizerPatterns.php
@@ -44,7 +44,7 @@ public function __construct()
         $this->nonAsciiPattern = '[^\x00-\x7F]';
         $this->nmCharPattern = '[_a-z0-9-]|'.$this->escapePattern.'|'.$this->nonAsciiPattern;
         $this->nmStartPattern = '[_a-z]|'.$this->escapePattern.'|'.$this->nonAsciiPattern;
-        $this->identifierPattern = '(?:'.$this->nmStartPattern.')(?:'.$this->nmCharPattern.')*';
+        $this->identifierPattern = '-?(?:'.$this->nmStartPattern.')(?:'.$this->nmCharPattern.')*';
         $this->hashPattern = '#((?:'.$this->nmCharPattern.')+)';
         $this->numberPattern = '[+-]?(?:[0-9]*\.[0-9]+|[0-9]+)';
         $this->quotedStringPattern = '([^\n\r\f%s]|'.$this->stringEscapePattern.')*';
diff --git a/src/Symfony/Component/CssSelector/Tests/Parser/ParserTest.php b/src/Symfony/Component/CssSelector/Tests/Parser/ParserTest.php
index 37a3ef1d58de..53b35a95473c 100644
--- a/src/Symfony/Component/CssSelector/Tests/Parser/ParserTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Parser/ParserTest.php
@@ -186,6 +186,7 @@ public function getPseudoElementsTestData()
             array('foo:after', 'Element[foo]', 'after'),
             array('foo::selection', 'Element[foo]', 'selection'),
             array('lorem#ipsum ~ a#b.c[href]:empty::selection', 'CombinedSelector[Hash[Element[lorem]#ipsum] ~ Pseudo[Attribute[Class[Hash[Element[a]#b].c][href]]:empty]]', 'selection'),
+            array('video::-webkit-media-controls', 'Element[video]', '-webkit-media-controls'),
         );
     }