diff --git a/apps/opencs/view/render/pagedworldspacewidget.cpp b/apps/opencs/view/render/pagedworldspacewidget.cpp
index 543f3788a7..7403113b37 100644
--- a/apps/opencs/view/render/pagedworldspacewidget.cpp
+++ b/apps/opencs/view/render/pagedworldspacewidget.cpp
@@ -319,6 +319,8 @@ void CSVRender::PagedWorldspaceWidget::clearSelection (int elementMask)
     for (std::map<CSMWorld::CellCoordinates, Cell *>::iterator iter = mCells.begin();
         iter!=mCells.end(); ++iter)
         iter->second->setSelection (elementMask, Cell::Selection_Clear);
+
+    flagAsModified();
 }
 
 CSVWidget::SceneToolToggle *CSVRender::PagedWorldspaceWidget::makeControlVisibilitySelector (
diff --git a/apps/opencs/view/render/unpagedworldspacewidget.cpp b/apps/opencs/view/render/unpagedworldspacewidget.cpp
index 989c976ff1..68f068daca 100644
--- a/apps/opencs/view/render/unpagedworldspacewidget.cpp
+++ b/apps/opencs/view/render/unpagedworldspacewidget.cpp
@@ -105,6 +105,7 @@ bool CSVRender::UnpagedWorldspaceWidget::handleDrop (const std::vector<CSMWorld:
 void CSVRender::UnpagedWorldspaceWidget::clearSelection (int elementMask)
 {
     mCell->setSelection (elementMask, Cell::Selection_Clear);
+    flagAsModified();
 }
 
 void CSVRender::UnpagedWorldspaceWidget::referenceableDataChanged (const QModelIndex& topLeft,