diff --git a/navalplanner-webapp/src/main/java/org/navalplanner/web/orders/ManageOrderElementAdvancesController.java b/navalplanner-webapp/src/main/java/org/navalplanner/web/orders/ManageOrderElementAdvancesController.java
index c259a6f71..d509dd2fb 100644
--- a/navalplanner-webapp/src/main/java/org/navalplanner/web/orders/ManageOrderElementAdvancesController.java
+++ b/navalplanner-webapp/src/main/java/org/navalplanner/web/orders/ManageOrderElementAdvancesController.java
@@ -554,6 +554,12 @@ public class ManageOrderElementAdvancesController extends
             }
         });
 
+        if (advance instanceof IndirectAdvanceAssignment) {
+            removeButton.setDisabled(true);
+            removeButton
+                    .setTooltiptext(_("Calculated advances can not be removed"));
+        }
+
         Listcell listCell = new Listcell();
         listCell.appendChild(removeButton);
         listItem.appendChild(listCell);