diff --git a/library/HTMLPurifier/Filter/ExtractStyleBlocks.php b/library/HTMLPurifier/Filter/ExtractStyleBlocks.php
index bc5d0da2..cc4324b6 100644
--- a/library/HTMLPurifier/Filter/ExtractStyleBlocks.php
+++ b/library/HTMLPurifier/Filter/ExtractStyleBlocks.php
@@ -95,7 +95,7 @@ class HTMLPurifier_Filter_ExtractStyleBlocks extends HTMLPurifier_Filter
         if ($tidy !== null) {
             $this->_tidy = $tidy;
         }
-        $html = preg_replace_callback('#<style(?:\s.*)?>(.*)</style>#isU', array($this, 'styleCallback'), $html);
+        $html = preg_replace_callback('#<style(?:\s.*)?>(.*)<\/style>#isU', array($this, 'styleCallback'), $html);
         $style_blocks = array_filter($this->_styleMatches);
         $this->_styleMatches = array(); // reset
         $context->register('StyleBlocks', $style_blocks); // $context must not be reused