diff --git a/src/MissionManager/MissionManager.cc b/src/MissionManager/MissionManager.cc
index bb538b8c8bb091dcee51de22d7ba8c411790b541..950c61dec685258bb56019571671c2c3464bf97c 100644
--- a/src/MissionManager/MissionManager.cc
+++ b/src/MissionManager/MissionManager.cc
@@ -55,6 +55,7 @@ void MissionManager::_writeMissionItemsWorker(void)
     qCDebug(MissionManagerLog) << "writeMissionItems count:" << _writeMissionItems.count();
 
     // Prime write list
+    _itemIndicesToWrite.clear();
     for (int i=0; i<_writeMissionItems.count(); i++) {
         _itemIndicesToWrite << i;
     }