diff --git a/htdocs/core/modules/expedition/doc/pdf_rouget.modules.php b/htdocs/core/modules/expedition/doc/pdf_rouget.modules.php
index a19d98748ee..ad0272f46a1 100644
--- a/htdocs/core/modules/expedition/doc/pdf_rouget.modules.php
+++ b/htdocs/core/modules/expedition/doc/pdf_rouget.modules.php
@@ -536,12 +536,12 @@ class pdf_rouget extends ModelePdfExpedition
 					$weighttxt = '';
 					if ($object->lines[$i]->fk_product_type == 0 && $object->lines[$i]->weight)
 					{
-						$weighttxt = round($object->lines[$i]->weight * $object->lines[$i]->qty_shipped, 5).' '.measuringUnitString(0, "weight", $object->lines[$i]->weight_units);
+						$weighttxt = round($object->lines[$i]->weight * $object->lines[$i]->qty_shipped, 5).' '.measuringUnitString(0, "weight", $object->lines[$i]->weight_units, 1);
 					}
 					$voltxt = '';
 					if ($object->lines[$i]->fk_product_type == 0 && $object->lines[$i]->volume)
 					{
-						$voltxt = round($object->lines[$i]->volume * $object->lines[$i]->qty_shipped, 5).' '.measuringUnitString(0, "volume", $object->lines[$i]->volume_units ? $object->lines[$i]->volume_units : 0);
+						$voltxt = round($object->lines[$i]->volume * $object->lines[$i]->qty_shipped, 5).' '.measuringUnitString(0, "volume", $object->lines[$i]->volume_units ? $object->lines[$i]->volume_units : 0, 1);
 					}
 
 					if (empty($conf->global->SHIPPING_PDF_HIDE_WEIGHT_AND_VOLUME))