diff --git a/core/src/main/java/org/phoenixctms/ctsms/service/inventory/InventoryServiceImpl.java b/core/src/main/java/org/phoenixctms/ctsms/service/inventory/InventoryServiceImpl.java
index 5f6b0b71a5b4..374f49bae8ff 100644
--- a/core/src/main/java/org/phoenixctms/ctsms/service/inventory/InventoryServiceImpl.java
+++ b/core/src/main/java/org/phoenixctms/ctsms/service/inventory/InventoryServiceImpl.java
@@ -996,7 +996,7 @@ protected Collection<StaffStatusEntryOutVO> handleGetCollidingStaffStatusEntries
 			while (it.hasNext()) {
 				CourseParticipationStatusEntry courseParticipationStatusEntry = it.next();
 				collidingStaffStatusEntries.addAll(staffStatusEntryDao.findByStaffInterval(courseParticipationStatusEntry.getStaff().getId(), courseInventoryBooking.getStart(),
-						courseInventoryBooking.getStop(), false, null, false));
+						courseInventoryBooking.getStop(), false, true, null, false));
 			}
 			staffStatusEntryDao.toStaffStatusEntryOutVOCollection(collidingStaffStatusEntries);
 			return new ArrayList<StaffStatusEntryOutVO>(collidingStaffStatusEntries);