diff --git a/class/actions_subtotal.class.php b/class/actions_subtotal.class.php
index abebe50d..722b4c47 100644
--- a/class/actions_subtotal.class.php
+++ b/class/actions_subtotal.class.php
@@ -909,7 +909,7 @@ function pdf_add_total(&$pdf,&$object, &$line, $label, $description,$posx, $posy
 				}
 			}
 			
-			if($total_to_print) {
+			if($total_to_print !== '') {
 				
 				if (GETPOST('hideInnerLines'))
 				{