1 files changed, 1 insertions, 1 deletions
diff --git a/fxbarcode/datamatrix/BC_DataMatrixWriter.h b/fxbarcode/datamatrix/BC_DataMatrixWriter.h
index ba2c54762e..6fa41c0c66 100644
--- a/fxbarcode/datamatrix/BC_DataMatrixWriter.h
+++ b/fxbarcode/datamatrix/BC_DataMatrixWriter.h
@@ -13,7 +13,7 @@ class CBC_CommonByteMatrix;
 class CBC_DefaultPlacement;
 class CBC_SymbolInfo;
 
-class CBC_DataMatrixWriter : public CBC_TwoDimWriter {
+class CBC_DataMatrixWriter final : public CBC_TwoDimWriter {
  public:
   CBC_DataMatrixWriter();
   ~CBC_DataMatrixWriter() override;