diff --git a/htdocs/comm/propal/class/propal.class.php b/htdocs/comm/propal/class/propal.class.php
index 507a9dce633..1a800dbf944 100644
--- a/htdocs/comm/propal/class/propal.class.php
+++ b/htdocs/comm/propal/class/propal.class.php
@@ -2876,11 +2876,12 @@ class PropaleLigne  extends CommonObject
         if (empty($this->total_localtax2)) $this->total_localtax2=0;
         if (empty($this->rang)) $this->rang=0;
         if (empty($this->remise)) $this->remise=0;
-        if (empty($this->remise_percent)) $this->remise_percent=0;
+        if (empty($this->remise_percent) || ! is_numeric($this->remise_percent)) $this->remise_percent=0;
         if (empty($this->info_bits)) $this->info_bits=0;
         if (empty($this->special_code)) $this->special_code=0;
         if (empty($this->fk_parent_line)) $this->fk_parent_line=0;
         if (empty($this->fk_fournprice)) $this->fk_fournprice=0;
+		if (! is_numeric($this->qty)) $this->qty = 0;
 
         if (empty($this->pa_ht)) $this->pa_ht=0;