diff --git a/Classes/PHPExcel/Calculation/LookupRef.php b/Classes/PHPExcel/Calculation/LookupRef.php
index d86055121..ba3d74502 100644
--- a/Classes/PHPExcel/Calculation/LookupRef.php
+++ b/Classes/PHPExcel/Calculation/LookupRef.php
@@ -598,6 +598,16 @@ public static function MATCH($lookup_value, $lookup_array, $match_type = 1)
      */
     public static function INDEX($arrayValues, $rowNum = 0, $columnNum = 0)
     {
+        
+        if(is_array($rowNum)){
+			foreach($rowNum as $k=>$v){
+				foreach($v as $k2=>$v2){
+					$rowNum = $v2;
+					break 2;
+				}
+			}
+		}
+		        
         if (($rowNum < 0) || ($columnNum < 0)) {
             return PHPExcel_Calculation_Functions::VALUE();
         }