Index: Classes/Core/ViewHelper/AbstractTagBasedViewHelper.php
===================================================================
--- Classes/Core/ViewHelper/AbstractTagBasedViewHelper.php	(revision 3355)
+++ Classes/Core/ViewHelper/AbstractTagBasedViewHelper.php	(working copy)
@@ -103,12 +103,13 @@
 	 * @param string $type Type of the tag attribute
 	 * @param string $description Description of tag attribute
 	 * @param boolean $required set to TRUE if tag attribute is required. Defaults to FALSE.
+	 * @param string $default Default value
 	 * @return void
 	 * @author Sebastian Kurfürst <sebastian@typo3.org>
 	 * @api
 	 */
-	protected function registerTagAttribute($name, $type, $description, $required = FALSE) {
-		$this->registerArgument($name, $type, $description, $required, NULL);
+	protected function registerTagAttribute($name, $type, $description, $required = FALSE, $default = NULL) {
+		$this->registerArgument($name, $type, $description, $required, $default);
 		$this->tagAttributes[] = $name;
 	}