diff --git a/libreplan-webapp/src/main/java/org/libreplan/web/planner/taskedition/TaskPropertiesController.java b/libreplan-webapp/src/main/java/org/libreplan/web/planner/taskedition/TaskPropertiesController.java
index 63743d0cf..da83b74a8 100644
--- a/libreplan-webapp/src/main/java/org/libreplan/web/planner/taskedition/TaskPropertiesController.java
+++ b/libreplan-webapp/src/main/java/org/libreplan/web/planner/taskedition/TaskPropertiesController.java
@@ -143,8 +143,12 @@ public class TaskPropertiesController extends GenericForwardComposer {
     private void setItemsStartConstraintTypesCombo(Order order) {
         startConstraintTypes.getChildren().clear();
         for (PositionConstraintType type : PositionConstraintType.values()) {
-            if (type != PositionConstraintType.AS_LATE_AS_POSSIBLE
-                    || order.getDeadline() != null) {
+            if ((type != PositionConstraintType.AS_LATE_AS_POSSIBLE &&
+                        type != PositionConstraintType.AS_SOON_AS_POSSIBLE) ||
+                    (type == PositionConstraintType.AS_LATE_AS_POSSIBLE &&
+                        order.getDeadline() != null) ||
+                    (type == PositionConstraintType.AS_SOON_AS_POSSIBLE &&
+                        order.getInitDate() != null)) {
                 Comboitem comboitem = new Comboitem(_(type.getName()));
                 comboitem.setValue(type);
                 startConstraintTypes.appendChild(comboitem);