diff --git a/parse-buildlog.py b/parse-buildlog.py
index 1780ea1fc4..3f82c847f9 100644
--- a/parse-buildlog.py
+++ b/parse-buildlog.py
@@ -212,7 +212,7 @@ def converterPython2(value):
 		
 		# Excel の列にフィルタを設定する
 		start = openpyxl.utils.get_column_letter(1)
-		end   = openpyxl.utils.get_column_letter(len(excelKeys)+1)
+		end   = openpyxl.utils.get_column_letter(len(excelKeys))
 		ws.auto_filter.ref = start + ":" + end
 		
 		# ウィンドウ枠を固定