diff --git a/plugins/3MFReader/WorkspaceDialog.py b/plugins/3MFReader/WorkspaceDialog.py
index 6acccbb1bc..7c803486eb 100644
--- a/plugins/3MFReader/WorkspaceDialog.py
+++ b/plugins/3MFReader/WorkspaceDialog.py
@@ -276,8 +276,8 @@ class WorkspaceDialog(QObject):
 
     def hide(self):
         self._visible = False
-        self._lock.release()
         self._view.hide()
+        self._lock.release()
 
     @pyqtSlot()
     def onOkButtonClicked(self):