1 files changed, 3 insertions, 3 deletions
diff --git a/fpdfsdk/pwl/cpwl_special_button.h b/fpdfsdk/pwl/cpwl_special_button.h
index 076b5298ed..b980f84625 100644
--- a/fpdfsdk/pwl/cpwl_special_button.h
+++ b/fpdfsdk/pwl/cpwl_special_button.h
@@ -9,7 +9,7 @@
 
 #include "fpdfsdk/pwl/cpwl_button.h"
 
-class CPWL_PushButton : public CPWL_Button {
+class CPWL_PushButton final : public CPWL_Button {
  public:
   CPWL_PushButton();
   ~CPWL_PushButton() override;
@@ -19,7 +19,7 @@ class CPWL_PushButton : public CPWL_Button {
   CFX_FloatRect GetFocusRect() const override;
 };
 
-class CPWL_CheckBox : public CPWL_Button {
+class CPWL_CheckBox final : public CPWL_Button {
  public:
   CPWL_CheckBox();
   ~CPWL_CheckBox() override;
@@ -36,7 +36,7 @@ class CPWL_CheckBox : public CPWL_Button {
   bool m_bChecked;
 };
 
-class CPWL_RadioButton : public CPWL_Button {
+class CPWL_RadioButton final : public CPWL_Button {
  public:
   CPWL_RadioButton();
   ~CPWL_RadioButton() override;