diff --git a/dibi/libs/DibiFluent.php b/dibi/libs/DibiFluent.php
index c67ee2f1..e5def376 100644
--- a/dibi/libs/DibiFluent.php
+++ b/dibi/libs/DibiFluent.php
@@ -460,6 +460,7 @@ class DibiFluent extends DibiObject implements IDataSource
 		// remove references
 		foreach ($this->clauses as $clause => $val) {
 			$this->clauses[$clause] = & $val;
+			unset($val);
 		}
 		$this->cursor = & $foo;
 	}