diff --git a/timesheet/inc/class.timesheet_datasource.inc.php b/timesheet/inc/class.timesheet_datasource.inc.php
index 31c4f8f738..db6dbbc536 100644
--- a/timesheet/inc/class.timesheet_datasource.inc.php
+++ b/timesheet/inc/class.timesheet_datasource.inc.php
@@ -74,7 +74,7 @@ class timesheet_datasource extends datasource
 			'pl_id'          => $data['pl_id'],
 			'pe_unitprice'   => $data['ts_unitprice'],
 			'pe_used_quantity' => $data['ts_quantity'],
-			'pe_used_budget' => $data['ts_quantity'] * $data['ts_unitprice'],
+			'pe_used_budget' => $data['ts_quantity'] * (float)$data['ts_unitprice'],
 			'pe_completion'  => 100,
 			'cat_id'         => $data['cat_id'],
 		);