diff --git a/modules/blockcart/blockcart.php b/modules/blockcart/blockcart.php
index 8d5f845c4..0dfce8c19 100644
--- a/modules/blockcart/blockcart.php
+++ b/modules/blockcart/blockcart.php
@@ -43,7 +43,7 @@ class BlockCart extends Module
 		$this->description = $this->l('Adds a block containing the customer\'s shopping cart.');
 	}
 
-	public function assignContentVars(&$params)
+	public function assignContentVars($params)
 	{
 		global $errors;