diff --git a/TCatTrackingWithDiffusedChargeProcessor.cc b/TCatTrackingWithDiffusedChargeProcessor.cc
index 70119e3a23d67787b49b37917921957b0c0aeeee..d03f65b44853e098038344f6e1903668b7cc0e21 100644
--- a/TCatTrackingWithDiffusedChargeProcessor.cc
+++ b/TCatTrackingWithDiffusedChargeProcessor.cc
@@ -3,7 +3,7 @@
  * @brief  tracking with diffused charge
  *
  * @date   Created       : 2016-07-24 08:49:05 JST
- *         Last Modified : 2020-06-21 18:28:13 JST (ota)
+ *         Last Modified : 2020-06-29 10:46:35 JST (ota)
  * @author Shinsuke OTA <ota@cns.s.u-tokyo.ac.jp>
  *
  *    (C) 2016 Shinsuke OTA
@@ -237,7 +237,7 @@ void TCatTrackingWithDiffusedChargeProcessor::ReconstructTrack(const TCatTpcTrac
       min.FixVariable(fIndependentVariable);
       min.FixVariable(fIndependentVariable+3);
 //      min.FixVariable(1);
-//      min.FixVariable(4);
+      min.FixVariable(4);
       if (fInitialRange > 0) {
          min.FixVariable(6);
       }