Fixed T25710

Summary: Signed-off-by: Ralf Floca <r.floca@dkfz-heidelberg.de>

Test Plan: Unit tests

Reviewers: MITK Reviewer Group I, kislinsk

Reviewed By: MITK Reviewer Group I, kislinsk

Subscribers: kislinsk

Maniphest Tasks: T25710

Differential Revision: https://phabricator.mitk.org/D180