diff --git a/Classes/PHPExcel/Cell/DefaultValueBinder.php b/Classes/PHPExcel/Cell/DefaultValueBinder.php
index f8f9309c9..4212849a2 100644
--- a/Classes/PHPExcel/Cell/DefaultValueBinder.php
+++ b/Classes/PHPExcel/Cell/DefaultValueBinder.php
@@ -60,7 +60,7 @@ public function bindValue(PHPExcel_Cell $cell, $value = null)
 		}
 
 		// Set value explicit
-		$cell->setValueExplicit( $value, self::dataTypeForValue($value) );
+		$cell->setValueExplicit( $value, $this->dataTypeForValue($value) );
 
 		// Done!
 		return true;