diff --git a/fxbarcode/pdf417/BC_PDF417.cpp b/fxbarcode/pdf417/BC_PDF417.cpp
index 30b3f42..ee45242 100644
--- a/fxbarcode/pdf417/BC_PDF417.cpp
+++ b/fxbarcode/pdf417/BC_PDF417.cpp
@@ -438,7 +438,7 @@
     return false;
   }
   WideString fullCodewords = dataCodewords + ec;
-  m_barcodeMatrix = pdfium::MakeUnique<CBC_BarcodeMatrix>(rows, cols);
+  m_barcodeMatrix = pdfium::MakeUnique<CBC_BarcodeMatrix>(cols, rows);
   encodeLowLevel(fullCodewords, cols, rows, errorCorrectionLevel,
                  m_barcodeMatrix.get());
   return true;
diff --git a/fxbarcode/pdf417/BC_PDF417BarcodeMatrix.cpp b/fxbarcode/pdf417/BC_PDF417BarcodeMatrix.cpp
index 32db82e..1d05486 100644
--- a/fxbarcode/pdf417/BC_PDF417BarcodeMatrix.cpp
+++ b/fxbarcode/pdf417/BC_PDF417BarcodeMatrix.cpp
@@ -24,7 +24,7 @@
 #include "fxbarcode/pdf417/BC_PDF417BarcodeRow.h"
 #include "third_party/base/ptr_util.h"
 
-CBC_BarcodeMatrix::CBC_BarcodeMatrix(size_t height, size_t width)
+CBC_BarcodeMatrix::CBC_BarcodeMatrix(size_t width, size_t height)
     : m_width((width + 4) * 17 + 1), m_height(height) {
   m_matrix.resize(m_height);
   for (size_t i = 0; i < m_height; ++i)
diff --git a/fxbarcode/pdf417/BC_PDF417BarcodeMatrix.h b/fxbarcode/pdf417/BC_PDF417BarcodeMatrix.h
index bee2ef9..1359ac2 100644
--- a/fxbarcode/pdf417/BC_PDF417BarcodeMatrix.h
+++ b/fxbarcode/pdf417/BC_PDF417BarcodeMatrix.h
@@ -14,7 +14,7 @@
 
 class CBC_BarcodeMatrix {
  public:
-  CBC_BarcodeMatrix(size_t height, size_t width);
+  CBC_BarcodeMatrix(size_t width, size_t height);
   virtual ~CBC_BarcodeMatrix();
 
   CBC_BarcodeRow* getRow(size_t row) const { return m_matrix[row].get(); }