1 files changed, 2 insertions, 2 deletions
diff --git a/fpdfsdk/formfiller/cffl_combobox.h b/fpdfsdk/formfiller/cffl_combobox.h
index 7a6390e491..2769b5354c 100644
--- a/fpdfsdk/formfiller/cffl_combobox.h
+++ b/fpdfsdk/formfiller/cffl_combobox.h
@@ -19,8 +19,8 @@ struct FFL_ComboBoxState {
   WideString sValue;
 };
 
-class CFFL_ComboBox : public CFFL_TextObject,
-                      public CPWL_Wnd::FocusHandlerIface {
+class CFFL_ComboBox final : public CFFL_TextObject,
+                            public CPWL_Wnd::FocusHandlerIface {
  public:
   CFFL_ComboBox(CPDFSDK_FormFillEnvironment* pApp, CPDFSDK_Widget* pWidget);
   ~CFFL_ComboBox() override;