1 files changed, 2 insertions, 2 deletions
diff --git a/fpdfsdk/formfiller/cffl_textfield.h b/fpdfsdk/formfiller/cffl_textfield.h
index 4d34d055a5..a1e48b6a29 100644
--- a/fpdfsdk/formfiller/cffl_textfield.h
+++ b/fpdfsdk/formfiller/cffl_textfield.h
@@ -24,8 +24,8 @@ struct FFL_TextFieldState {
   WideString sValue;
 };
 
-class CFFL_TextField : public CFFL_TextObject,
-                       public CPWL_Wnd::FocusHandlerIface {
+class CFFL_TextField final : public CFFL_TextObject,
+                             public CPWL_Wnd::FocusHandlerIface {
  public:
   CFFL_TextField(CPDFSDK_FormFillEnvironment* pApp, CPDFSDK_Widget* pWidget);
   ~CFFL_TextField() override;