diff --git a/feature-based-molecular-networking/tools/feature-based-molecular-networking/scripts/prep_molecular_networking_parameters.py b/feature-based-molecular-networking/tools/feature-based-molecular-networking/scripts/prep_molecular_networking_parameters.py
index 00f838dd..3fabaf35 100644
--- a/feature-based-molecular-networking/tools/feature-based-molecular-networking/scripts/prep_molecular_networking_parameters.py
+++ b/feature-based-molecular-networking/tools/feature-based-molecular-networking/scripts/prep_molecular_networking_parameters.py
@@ -57,6 +57,7 @@ def main():
         output_parameter_file.write("TOLERANCE_PM=%s\n" % (params_object["tolerance.PM_tolerance"][0]))
         output_parameter_file.write("PAIRS_MIN_COSINE=%s\n" % (params_object["PAIRS_MIN_COSINE"][0]))
         output_parameter_file.write("MAX_SHIFT=%s\n" % (params_object["MAX_SHIFT"][0]))
+        output_parameter_file.write("MIN_RATIO=%s\n" % ("0.0"))
         output_parameter_file.write("INPUT_SPECTRA_MS2=%s\n" % (args.mgf_filename))