diff --git a/vcl/inc/qt5/QtInstanceTreeView.hxx b/vcl/inc/qt5/QtInstanceTreeView.hxx
index 15fab0ff0792..110bc09c8bd2 100644
--- a/vcl/inc/qt5/QtInstanceTreeView.hxx
+++ b/vcl/inc/qt5/QtInstanceTreeView.hxx
@@ -44,7 +44,7 @@ public:
     virtual void unselect(int nPos) override;
     virtual void remove(int pos) override;
     virtual OUString get_text(int nRow, int nCol = -1) const override;
-    virtual void set_text(int row, const OUString& rText, int col = -1) override;
+    virtual void set_text(int nRow, const OUString& rText, int nCol = -1) override;
     virtual void set_sensitive(int row, bool bSensitive, int col = -1) override;
     virtual bool get_sensitive(int row, int col) const override;
     virtual void set_id(int row, const OUString& rId) override;
diff --git a/vcl/qt5/QtInstanceTreeView.cxx b/vcl/qt5/QtInstanceTreeView.cxx
index e2d28af9932c..23fe407e8033 100644
--- a/vcl/qt5/QtInstanceTreeView.cxx
+++ b/vcl/qt5/QtInstanceTreeView.cxx
@@ -162,9 +162,20 @@ OUString QtInstanceTreeView::get_text(int nRow, int nCol) const
     return sText;
 }
 
-void QtInstanceTreeView::set_text(int, const OUString&, int)
+void QtInstanceTreeView::set_text(int nRow, const OUString& rText, int nCol)
 {
-    assert(false && "Not implemented yet");
+    assert(nCol != -1 && "Support for special index -1 (first text column) not implemented yet");
+
+    SolarMutexGuard g;
+    GetQtInstance().RunInMainThread([&] {
+        QStandardItem* pItem = m_pModel->item(nRow, nCol);
+        if (!pItem)
+        {
+            pItem = new QStandardItem;
+            m_pModel->setItem(nRow, nCol, pItem);
+        }
+        pItem->setText(toQString(rText));
+    });
 }
 
 void QtInstanceTreeView::set_sensitive(int, bool, int) { assert(false && "Not implemented yet"); }