diff --git a/src/lib/app/RvCommon/RvDocument.cpp b/src/lib/app/RvCommon/RvDocument.cpp
index 74938f22e..773864e6d 100644
--- a/src/lib/app/RvCommon/RvDocument.cpp
+++ b/src/lib/app/RvCommon/RvDocument.cpp
@@ -207,6 +207,7 @@ namespace Rv
 
         // Dockable to QMainWindow, not centralwidget.
         m_diagnosticsDock = new QDockWidget(tr("Diagnostics"), this);
+        m_diagnosticsDock->setObjectName("Diagnostics");
         m_diagnosticsDock->setWidget(m_diagnosticsView);
         m_diagnosticsDock->setAllowedAreas(Qt::AllDockWidgetAreas);
         addDockWidget(Qt::BottomDockWidgetArea, m_diagnosticsDock);