diff --git a/libreofficekit/source/gtk/lokdocview.cxx b/libreofficekit/source/gtk/lokdocview.cxx
index 3ecf52ccf6c7..155174f2a289 100644
--- a/libreofficekit/source/gtk/lokdocview.cxx
+++ b/libreofficekit/source/gtk/lokdocview.cxx
@@ -152,6 +152,7 @@ struct LOKDocViewPrivateImpl
         m_nDocumentHeightTwips(0),
         m_bEdit(FALSE),
         m_nLOKFeatures(0),
+        m_nParts(0),
         m_aVisibleCursor({0, 0, 0, 0}),
         m_bCursorOverlayVisible(false),
         m_bCursorVisible(true),