diff --git a/plugins/classbrowser/classwidget.cpp b/plugins/classbrowser/classwidget.cpp
--- a/plugins/classbrowser/classwidget.cpp
+++ b/plugins/classbrowser/classwidget.cpp
@@ -68,6 +68,7 @@
     m_filterTimer->setSingleShot(true);
     m_filterTimer->setInterval(500);
     connect(m_filterTimer, &QTimer::timeout, this, [this]() {
+        m_tree->setCurrentIndex(QModelIndex());
         m_model->updateFilterString(m_filterText);
 
         if (m_filterText.isEmpty())