diff --git a/Classes/PHPExcel/Worksheet.php b/Classes/PHPExcel/Worksheet.php
index 3094fb3..257fc7a 100644
--- a/Classes/PHPExcel/Worksheet.php
+++ b/Classes/PHPExcel/Worksheet.php
@@ -1054,7 +1054,7 @@ class PHPExcel_Worksheet implements PHPExcel_IComparable
      */
     public function setCellValueByColumnAndRow($pColumn = 0, $pRow = 1, $pValue = null, $returnCell = false)
     {
-        $cell = $this->getCell(PHPExcel_Cell::stringFromColumnIndex($pColumn) . $pRow)->setValue($pValue);
+        $cell = $this->getCellByColumnAndRow($pColumn, $pRow)->setValue($pValue);
         return ($returnCell) ? $cell : $this;
     }
 
@@ -1086,7 +1086,7 @@ class PHPExcel_Worksheet implements PHPExcel_IComparable
      */
     public function setCellValueExplicitByColumnAndRow($pColumn = 0, $pRow = 1, $pValue = null, $pDataType = PHPExcel_Cell_DataType::TYPE_STRING, $returnCell = false)
     {
-        $cell = $this->getCell(PHPExcel_Cell::stringFromColumnIndex($pColumn) . $pRow)->setValueExplicit($pValue, $pDataType);
+        $cell = $this->getCellByColumnAndRow($pColumn, $pRow)->setValueExplicit($pValue, $pDataType);
         return ($returnCell) ? $cell : $this;
     }