diff --git a/htdocs/compta/facture/card.php b/htdocs/compta/facture/card.php
index d2b8ea87dcf..1f6c9a329b9 100644
--- a/htdocs/compta/facture/card.php
+++ b/htdocs/compta/facture/card.php
@@ -677,7 +677,7 @@ if (empty($reshook))
 		$result=$discountcheck->fetch(0,$object->id);
 
 		$canconvert=0;
-		if ($object->type == Facture::TYPE_DEPOSIT && empty($discountcheck->id)) $canconvert=1;	// we can convert deposit into discount if deposit is payed completely and not already converted (see real condition into condition used to show button converttoreduc)
+		if ($object->type == Facture::TYPE_DEPOSIT && empty($discountcheck->id)) $canconvert=1;	// we can convert deposit into discount if deposit is payed (completely, partially or not at all) and not already converted (see real condition into condition used to show button converttoreduc)
 		if (($object->type == Facture::TYPE_CREDIT_NOTE || $object->type == Facture::TYPE_STANDARD) && $object->paye == 0 && empty($discountcheck->id)) $canconvert=1;	// we can convert credit note into discount if credit note is not payed back and not already converted and amount of payment is 0 (see real condition into condition used to show button converttoreduc)
 		if ($canconvert)
 		{