1 files changed, 1 insertions, 1 deletions
diff --git a/core/fpdfapi/page/cpdf_colorstate.h b/core/fpdfapi/page/cpdf_colorstate.h
index 49416db1d5..7b72a2a9d2 100644
--- a/core/fpdfapi/page/cpdf_colorstate.h
+++ b/core/fpdfapi/page/cpdf_colorstate.h
@@ -50,7 +50,7 @@ class CPDF_ColorState {
   bool HasRef() const { return !!m_Ref; }
 
  private:
-  class ColorData : public Retainable {
+  class ColorData final : public Retainable {
    public:
     ColorData();
     ColorData(const ColorData& src);