diff --git a/module/item-sheet.js b/module/item-sheet.js
index c8d20b98..b691fc6c 100644
--- a/module/item-sheet.js
+++ b/module/item-sheet.js
@@ -105,9 +105,9 @@ export class RdDItemSheet extends ItemSheet {
     // Everything below here is only needed if the sheet is editable
     if (!this.options.editable) return;
     
+
     // Select competence categorie
-    html.find(".categorie").on("click", this._onClickSelectCategorie.bind(this) );
-    html.find(".categoriepotion").on("click", this.render(true) );
+    html.find(".categorie").change(event => this._onSelectCategorie(event));
 
     html.find('.sheet-competence-xp').change((event) => {
       if ( this.object.data.type == 'competence') { 
@@ -153,12 +153,14 @@ export class RdDItemSheet extends ItemSheet {
   }
   
   /* -------------------------------------------- */
-  async _onClickSelectCategorie(event) {
+  async _onSelectCategorie(event) {
     event.preventDefault();
-    
-    let level = RdDItemCompetence.getNiveauBase(event.currentTarget.value);    
-    Misc.templateData(this.object).base = level;
-    $("#base").val( level ); 
+
+    if (this.object.isCompetence()){
+      let level = RdDItemCompetence.getNiveauBase(event.currentTarget.value);
+      Misc.templateData(this.object).base = level;
+      $("#base").val(level);
+    }
   }
 
   /* -------------------------------------------- */
diff --git a/module/item.js b/module/item.js
index cffc0737..b1de3222 100644
--- a/module/item.js
+++ b/module/item.js
@@ -17,6 +17,10 @@ export class RdDItem extends Item {
     return typesObjetsOeuvres;
   }
 
+  isCompetence() {
+    return Misc.data(this).type == 'competence';
+  }
+
   isConteneur() {
     return Misc.data(this).type == 'conteneur';
   }