diff --git a/src/Core/Column.h b/src/Core/Column.h
index 4ca353540..54fe4cf9a 100644
--- a/src/Core/Column.h
+++ b/src/Core/Column.h
@@ -53,14 +53,14 @@ template<typename MatrixType> class Column
     int _rows() const { return m_matrix.rows(); }
     int _cols() const { return 1; }
     
-    Scalar& _write(int row, int col=0)
+    Scalar& _write(int row, int col)
     {
       EIGEN_UNUSED(col);
       EIGEN_CHECK_ROW_RANGE(*this, row);
       return m_matrix.write(row, m_col);
     }
     
-    Scalar _read(int row, int col=0) const
+    Scalar _read(int row, int col) const
     {
       EIGEN_UNUSED(col);
       EIGEN_CHECK_ROW_RANGE(*this, row);
diff --git a/src/Core/DynBlock.h b/src/Core/DynBlock.h
index ea9be7680..8a52b4c58 100644
--- a/src/Core/DynBlock.h
+++ b/src/Core/DynBlock.h
@@ -59,12 +59,12 @@ template<typename MatrixType> class DynBlock
     int _rows() const { return m_blockRows; }
     int _cols() const { return m_blockCols; }
     
-    Scalar& _write(int row, int col=0)
+    Scalar& _write(int row, int col)
     {
       return m_matrix.write(row + m_startRow, col + m_startCol);
     }
     
-    Scalar _read(int row, int col=0) const
+    Scalar _read(int row, int col) const
     {
       return m_matrix.read(row + m_startRow, col + m_startCol);
     }
diff --git a/src/Core/Minor.h b/src/Core/Minor.h
index f39913d57..9c4116adb 100644
--- a/src/Core/Minor.h
+++ b/src/Core/Minor.h
@@ -41,7 +41,7 @@ template<typename MatrixType> class Minor
                           MatrixType::ColsAtCompileTime - 1 : Dynamic;
 
     Minor(const MatRef& matrix,
-                int row, int col = 0)
+                int row, int col)
       : m_matrix(matrix), m_row(row), m_col(col)
     {
       EIGEN_CHECK_RANGES(matrix, row, col);
@@ -58,12 +58,12 @@ template<typename MatrixType> class Minor
     int _rows() const { return m_matrix.rows() - 1; }
     int _cols() const { return m_matrix.cols() - 1; }
     
-    Scalar& _write(int row, int col=0)
+    Scalar& _write(int row, int col)
     {
       return m_matrix.write(row + (row >= m_row), col + (col >= m_col));
     }
     
-    Scalar _read(int row, int col=0) const
+    Scalar _read(int row, int col) const
     {
       return m_matrix.read(row + (row >= m_row), col + (col >= m_col));
     }