diff --git a/reco/detectors/rich/unpack/CbmRichUnpackMonitor.cxx b/reco/detectors/rich/unpack/CbmRichUnpackMonitor.cxx
index 8a7e48e61c5b88207e193ccbf46a9f18fcca7aa4..7a4daaf7bc1eae3fc5a503367e3075f907c35037 100644
--- a/reco/detectors/rich/unpack/CbmRichUnpackMonitor.cxx
+++ b/reco/detectors/rich/unpack/CbmRichUnpackMonitor.cxx
@@ -54,8 +54,9 @@ Bool_t CbmRichUnpackMonitor::CreateHistograms(CbmMcbm2018RichPar* pUnpackPar)
 
   for (Int_t i = 0; i < pUnpackPar->GetNaddresses(); ++i) {
     auto DiRICH = pUnpackPar->GetAddress(i);
-    TH2* hist   = new TH2D(Form("fhDigisToT_0x%04x", DiRICH),
-                         Form("fhDigisToT_0x%04x; channel; ToT [ns]; Entries", DiRICH), 33, 0, 32, 450, 15, 30.);
+    TH2* hist =
+      new TH2D(Form("fhDigisToT_0x%04x", DiRICH), Form("fhDigisToT_0x%04x; channel; ToT [ns]; Entries", DiRICH), 33, 0,
+               32, 450, 0x7900 < DiRICH ? 0 : 15., 0x7900 < DiRICH ? 45 : 30.);
     fhDigisToTDiRICH.push_back(hist);
     AddHistoToVector(fhDigisToTDiRICH.back(), "");
   }