diff --git a/src/libsync/syncjournaldb.cpp b/src/libsync/syncjournaldb.cpp
index 358f0f352..75b55d9b9 100644
--- a/src/libsync/syncjournaldb.cpp
+++ b/src/libsync/syncjournaldb.cpp
@@ -457,6 +457,8 @@ void SyncJournalDb::close()
 
     _getFileRecordQuery.reset(0);
     _setFileRecordQuery.reset(0);
+    _setFileRecordChecksumQuery.reset(0);
+    _setFileRecordMetadataQuery.reset(0);
     _getDownloadInfoQuery.reset(0);
     _setDownloadInfoQuery.reset(0);
     _deleteDownloadInfoQuery.reset(0);
@@ -468,6 +470,8 @@ void SyncJournalDb::close()
     _getErrorBlacklistQuery.reset(0);
     _setErrorBlacklistQuery.reset(0);
     _getSelectiveSyncListQuery.reset(0);
+    _getChecksumTypeIdQuery.reset(0);
+    _insertChecksumTypeQuery.reset(0);
 
     _db.close();
     _avoidReadFromDbOnNextSyncFilter.clear();
diff --git a/src/libsync/syncjournaldb.h b/src/libsync/syncjournaldb.h
index 69c7a769d..5aab92f55 100644
--- a/src/libsync/syncjournaldb.h
+++ b/src/libsync/syncjournaldb.h
@@ -166,6 +166,8 @@ private:
     QString _dbFile;
     QMutex _mutex; // Public functions are protected with the mutex.
     int _transaction;
+
+    // NOTE! when adding a query, don't forget to reset it in SyncJournalDb::close
     QScopedPointer<SqlQuery> _getFileRecordQuery;
     QScopedPointer<SqlQuery> _setFileRecordQuery;
     QScopedPointer<SqlQuery> _setFileRecordChecksumQuery;