diff --git a/module/actor.js b/module/actor.js
index ba777e43..71beea7e 100644
--- a/module/actor.js
+++ b/module/actor.js
@@ -1686,12 +1686,18 @@ export class RdDActor extends Actor {
         dmg = 0; // Reset it
         if ( update.data.deterioration >= 10) {          
           update.data.deterioration = 0;
-          if ( update.data.protection.toString().length == 1 ) 
-            update.data.protection = "1d"+update.data.protection+"-0";
-          else {
-            let regex = /d\(d+)\-(\d+)/g;
-            let res = regex.exec( update.data.protection );
-            update.data.protection = "1d"+res[1]+"-"+(parseInt(res[2])+1);            
+          let res = /\d+^/.exec(update.data.protection);
+          if ( res ) 
+            update.data.protection = "1d"+update.data.protection;
+          // if ( update.data.protection.toString().length == 1 ) 
+          // update.data.protection = "1d"+update.data.protection;
+          else if (res = /(\d+d\d+)(\-\d+)?/.exec( update.data.protection ))
+          {
+            let malus = Misc.toInt(res[2]) - 1;
+            update.data.protection = res[1] + malus;
+          }
+          else{
+            ui.notifications.warn(`La valeur d'armure de votre ${item.name} est incorrecte`)
           }
           ChatMessage.create( {content: "Détérioration d'armure: " + update.data.protection } );
         }
diff --git a/templates/item-armure-sheet.html b/templates/item-armure-sheet.html
index 7ca1a573..e2bcb8af 100644
--- a/templates/item-armure-sheet.html
+++ b/templates/item-armure-sheet.html
@@ -10,7 +10,7 @@
     <section class="sheet-body">
       <div class="form-group">
         <label for="xp">Protection</label>
-        <input class="attribute-value" type="text" name="data.protection" value="{{data.protection}}" data-dtype="Number"/>
+        <input class="attribute-value" type="text" name="data.protection" value="{{data.protection}}" data-dtype="String"/>
       </div>
       <div class="form-group">
         <label for="xp">Encombrement </label>