diff --git a/_calcul_dispo.html b/_calcul_dispo.html
index 5c75b0e..8d38221 100644
--- a/_calcul_dispo.html
+++ b/_calcul_dispo.html
@@ -122,7 +122,7 @@
                         var="equipments.%s.eqpmt.%s.exterieur"|args:$cat_key:$eqpmt_key
                         from=exterieur}}
                 {{elseif $elem.type == 'retour'}}
-                    {{:assign nonproprio="%d-%d"|math:nonproprio:$nombre}}
+                    {{:assign nonproprio="%d-%d"|math:$nonproprio:$nombre}}
                     {{:assign
                         var="equipments.%s.eqpmt.%s.nonproprio"|args:$cat_key:$eqpmt_key
                         from=nonproprio}}