diff --git a/algo/qa/Histogram.h b/algo/qa/Histogram.h
index d136f46b5fb521f5795d62c35c59900a6a613312..d05b17bc38c575b4bc97a327e69c693498f8f02b 100644
--- a/algo/qa/Histogram.h
+++ b/algo/qa/Histogram.h
@@ -257,6 +257,7 @@ namespace cbm::algo::qa
     {
       TotalSums::Reset();
       fHistogram.reset();
+      fEntries = 0;
     }
 
     /// \brief Sets name