diff --git a/include/wx/generic/private/markuptext.h b/include/wx/generic/private/markuptext.h
index 4235d50de8..4fa7286a2f 100644
--- a/include/wx/generic/private/markuptext.h
+++ b/include/wx/generic/private/markuptext.h
@@ -24,6 +24,8 @@ class wxMarkupParserOutput;
 class WXDLLIMPEXP_CORE wxMarkupTextBase
 {
 public:
+    virtual ~wxMarkupTextBase() {}
+
     // Update the markup string.
     void SetMarkup(const wxString& markup) { m_markup = markup; }