diff --git a/libreofficekit/qa/gtktiledviewer/gtktiledviewer.cxx b/libreofficekit/qa/gtktiledviewer/gtktiledviewer.cxx
index 0e77d969b5d9..b2962d4e0da1 100644
--- a/libreofficekit/qa/gtktiledviewer/gtktiledviewer.cxx
+++ b/libreofficekit/qa/gtktiledviewer/gtktiledviewer.cxx
@@ -140,6 +140,11 @@ public:
         m_pProgressBar(nullptr),
         m_pStatusbarLabel(nullptr),
         m_pZoomLabel(nullptr),
+        m_pSaveButton(nullptr),
+        m_pCopyButton(nullptr),
+        m_pPasteButton(nullptr),
+        m_pUndo(nullptr),
+        m_pRedo(nullptr),
         m_pEnableEditing(nullptr),
         m_pBold(nullptr),
         m_pItalic(nullptr),