diff --git a/mzLib/MassSpectrometry/Deconvolution/Parameters/IsoDecDeconvolutionParameters.cs b/mzLib/MassSpectrometry/Deconvolution/Parameters/IsoDecDeconvolutionParameters.cs
index 649ee9a11..f93940ad9 100644
--- a/mzLib/MassSpectrometry/Deconvolution/Parameters/IsoDecDeconvolutionParameters.cs
+++ b/mzLib/MassSpectrometry/Deconvolution/Parameters/IsoDecDeconvolutionParameters.cs
@@ -189,7 +189,7 @@ internal IsoSettings ToIsoSettings()
     public IsoDecDeconvolutionParameters(
         Polarity polarity = Polarity.Positive,
         int phaseRes = 8,
-        bool reportMultipleMonoisos = true,
+        bool reportMultipleMonoisos = false,
         float cssThreshold = (float)0.7,
         float matchTolerance = (float)5,
         int maxShift = 3,