diff --git a/macro/beamtime/mcbm2020/check_timing.C b/macro/beamtime/mcbm2020/check_timing.C
index c40955de5a700c00f2b4f83923bf35e9de7977a6..434b0d679c5f20992953b8dc43faeb1a594f2009 100644
--- a/macro/beamtime/mcbm2020/check_timing.C
+++ b/macro/beamtime/mcbm2020/check_timing.C
@@ -40,7 +40,7 @@ void check_timing(TString fileName,
   timeChecker->SetRichOffsetSearchRange(1000);
   timeChecker->SetPsdOffsetSearchRange(10000);
   timeChecker->SetT0PulserTotLimits(185, 191);
-  timeChecker->SetNrTsForFit(0);
+  timeChecker->SetNrTsForFit(-1); //Positive values: iterative peak fitting 
   if (0 < uRunId)
     timeChecker->SetOutFilename(
       Form("%sHistosTimeCheck_%03u.root", outDir.Data(), uRunId));