diff --git a/app/static/js/releve-but.js b/app/static/js/releve-but.js
index 7c6ec4ae..e011d395 100644
--- a/app/static/js/releve-but.js
+++ b/app/static/js/releve-but.js
@@ -376,8 +376,12 @@ class releveBUT extends HTMLElement {
         }</div>
 								<div class=info>`;
         if (!dataUE.date_capitalisation) {
-          output += `		Bonus&nbsp;:&nbsp;${dataUE.bonus || 0}&nbsp;- 
-									Malus&nbsp;:&nbsp;${dataUE.malus || 0}`;
+					output += `		Bonus&nbsp;:&nbsp;${dataUE.bonus || 0}&nbsp;- `;
+					if(dataUE.malus >= 0) {
+						output += `Malus&nbsp;:&nbsp;${dataUE.malus || 0}`;
+					} else {
+						output += `Bonus&nbsp;complémentaire&nbsp;:&nbsp;${-dataUE.malus || 0}`;
+					}
         } else {
           output += `		le ${this.ISOToDate(
             dataUE.date_capitalisation.split("T")[0]