diff --git a/benchmarks/rich/draw_benchmark.py b/benchmarks/rich/draw_benchmark.py
index 479c7f70a644038fa591a055edd2fea4187109bc..df7ec22c05e9eaeb770e26d4b7a8346338ca1396 100755
--- a/benchmarks/rich/draw_benchmark.py
+++ b/benchmarks/rich/draw_benchmark.py
@@ -183,9 +183,9 @@ for rad in ["Aerogel", "Gas"]:
     hist.Fit("gaus", "", "", resid_mode - nsigma*resid_dev, resid_mode + nsigma*resid_dev)
     if hist.GetFunction("gaus"):
         hist.GetFunction("gaus").SetLineWidth(5)
-        meanV = hist.GetFunction("gaus").GetParameter(1)
-        centralV = hist.GetFunction("gaus").GetParameter(2)
-        if meanV > 0.2*centralV :
+        centralV = hist.GetFunction("gaus").GetParameter(1)
+        sigmaV = hist.GetFunction("gaus").GetParameter(2)
+        if centralV > 0.2*sigmaV :
             print("dRICH Warning : residual plot has starnge central value")
     canv.cd(5)
     ana_file.Get(f'{pid_name}/highestWeight_dist_{rad}').Draw()