diff --git a/libreplan-business/src/main/java/org/libreplan/business/materials/entities/MaterialCategory.java b/libreplan-business/src/main/java/org/libreplan/business/materials/entities/MaterialCategory.java
index d764db745..3f670a76c 100644
--- a/libreplan-business/src/main/java/org/libreplan/business/materials/entities/MaterialCategory.java
+++ b/libreplan-business/src/main/java/org/libreplan/business/materials/entities/MaterialCategory.java
@@ -292,4 +292,9 @@ public class MaterialCategory extends IntegrationEntity {
         return lastMaterialSequenceCode;
     }
 
+    @Override
+    public String toString() {
+        return super.toString() + " :: " + getName();
+    }
+
 }
diff --git a/libreplan-webapp/src/main/java/org/libreplan/web/materials/MaterialsController.java b/libreplan-webapp/src/main/java/org/libreplan/web/materials/MaterialsController.java
index 0f54d204b..e002762f3 100644
--- a/libreplan-webapp/src/main/java/org/libreplan/web/materials/MaterialsController.java
+++ b/libreplan-webapp/src/main/java/org/libreplan/web/materials/MaterialsController.java
@@ -69,7 +69,6 @@ import org.zkoss.zul.Treechildren;
 import org.zkoss.zul.Treeitem;
 import org.zkoss.zul.TreeitemRenderer;
 import org.zkoss.zul.Treerow;
-import org.zkoss.zul.api.Panel;
 
 /**
  * Controller for {@link Material} materials
@@ -384,6 +383,7 @@ public class MaterialsController extends
     }
 
     private void reloadCategoriesTree(Treeitem treeitem) {
+        Util.reloadBindings(categoriesTree);
         if (treeitem != null) {
             final MaterialCategory materialCategory = (MaterialCategory) treeitem.getValue();
             categoriesTree.invalidate();