diff --git a/ClosedXML/Excel/Cells/XLCell.cs b/ClosedXML/Excel/Cells/XLCell.cs
index 1709adc..1bd50c4 100644
--- a/ClosedXML/Excel/Cells/XLCell.cs
+++ b/ClosedXML/Excel/Cells/XLCell.cs
@@ -855,7 +855,7 @@
                     else if (value == XLCellValues.Number)
                     {
                         double dTest;
-                        if (Double.TryParse(_cellValue, NumberStyles.AllowDecimalPoint, CultureInfo.InvariantCulture, out dTest))
+                        if (Double.TryParse(_cellValue, XLHelper.NumberStyle, CultureInfo.InvariantCulture, out dTest))
                             _cellValue = dTest.ToString(CultureInfo.InvariantCulture);
                         else
                         {
diff --git a/ClosedXML/Excel/XLWorkbook_Save.cs b/ClosedXML/Excel/XLWorkbook_Save.cs
index c6084d6..b612e7e 100644
--- a/ClosedXML/Excel/XLWorkbook_Save.cs
+++ b/ClosedXML/Excel/XLWorkbook_Save.cs
@@ -3916,7 +3916,7 @@
                                 if (!XLHelper.IsNullOrWhiteSpace(opCell.InnerText))
                                 {
                                     var cellValue = new CellValue();
-                                    cellValue.Text = Double.Parse(opCell.InnerText, NumberStyles.AllowDecimalPoint, CultureInfo.InvariantCulture).ToString(CultureInfo.InvariantCulture);
+                                    cellValue.Text = Double.Parse(opCell.InnerText, XLHelper.NumberStyle, CultureInfo.InvariantCulture).ToString(CultureInfo.InvariantCulture);
                                     cell.CellValue = cellValue;
                                 }
                             }