diff --git a/ExcelFile.tsf b/ExcelFile.tsf
index e511b03..17f2ddc 100755
--- a/ExcelFile.tsf
+++ b/ExcelFile.tsf
@@ -1262,7 +1262,7 @@ Type ExcelFile = Class
 	///col: string
 	///row: int
 	///·µ»Ø [err, cell:string]£¬²Î¼ûSplitCellName
-	Function JoinCellName(sheet);
+	Function JoinCellName(sheet, col, row);
 	Begin
 		return xlsx_call("JoinCellName", col, row);
 	End;