diff --git a/navalplanner-webapp/src/main/java/org/navalplanner/web/orders/materials/IAssignedMaterialsModel.java b/navalplanner-webapp/src/main/java/org/navalplanner/web/orders/materials/IAssignedMaterialsModel.java
index 21bc3a3b6..155042916 100644
--- a/navalplanner-webapp/src/main/java/org/navalplanner/web/orders/materials/IAssignedMaterialsModel.java
+++ b/navalplanner-webapp/src/main/java/org/navalplanner/web/orders/materials/IAssignedMaterialsModel.java
@@ -32,6 +32,8 @@ import org.zkoss.zul.TreeModel;
  */
 public interface IAssignedMaterialsModel<T, A> {
 
+    void initEdit(T entity);
+
     void addMaterialAssignment(Material material);
 
     void addMaterialAssignment(A materialAssignment);