diff --git a/htdocs/commande/fiche.php b/htdocs/commande/fiche.php
index 83206e63911..3af370fb4e1 100644
--- a/htdocs/commande/fiche.php
+++ b/htdocs/commande/fiche.php
@@ -1659,7 +1659,7 @@ else
 				print '<div class="tabsAction">';
 
 				// Valid
-				if ($commande->statut == 0 && $numlines > 0 && $user->rights->commande->valider)
+				if ($commande->statut == 0 && $commande->total_ttc >= 0 && $numlines > 0 && $user->rights->commande->valider)
 				{
 					print '<a class="butAction" ';
 					if ($conf->use_javascript_ajax && $conf->global->MAIN_CONFIRM_AJAX)