diff --git a/src/MSDIAL5/MsdialCore/Parameter/ParameterBase.cs b/src/MSDIAL5/MsdialCore/Parameter/ParameterBase.cs
index fa422c772..daad21164 100644
--- a/src/MSDIAL5/MsdialCore/Parameter/ParameterBase.cs
+++ b/src/MSDIAL5/MsdialCore/Parameter/ParameterBase.cs
@@ -107,8 +107,6 @@ public ParameterBase(bool isLabUseOnly) {
         [IgnoreMember]
         public string CompoundListForRtCorrectionPath { get => ReferenceFileParam.CompoundListForRtCorrectionPath; set => ReferenceFileParam.CompoundListForRtCorrectionPath = value; }
         [IgnoreMember]
-        public string RtCorrectionPeakSelectionFilePath { get => ReferenceFileParam.RtCorrectionPeakSelectionFilePath; set => ReferenceFileParam.RtCorrectionPeakSelectionFilePath = value; }
-        [IgnoreMember]
         public List<AdductIon> SearchedAdductIons { get => ReferenceFileParam.SearchedAdductIons; set => ReferenceFileParam.SearchedAdductIons = value; }
 
         // Export
@@ -538,7 +536,7 @@ public virtual List<string> ParametersAsText() {
             pStrings.Add(String.Join(": ", new string[] { "Isotope text DB file path", IsotopeTextDBFilePath.ToString() }));
             pStrings.Add(String.Join(": ", new string[] { "Compounds library file path for target detection", CompoundListInTargetModePath.ToString() }));
             pStrings.Add(String.Join(": ", new string[] { "Compounds library file path for RT correction", CompoundListForRtCorrectionPath.ToString() }));
-            pStrings.Add(String.Join(": ", new string[] { "RT correction peak selection file path", RtCorrectionPeakSelectionFilePath.ToString() }));
+            pStrings.Add(String.Join(": ", new string[] { "RT correction peak selection file path", ReferenceFileParam.RtCorrectionPeakSelectionFilePath?.ToString() ?? string.Empty }));
             pStrings.Add(String.Join(": ", new string[] { "Searched adduct ions", String.Join(",", SearchedAdductIons.Select(n => n.AdductIonName).ToArray()) }));
 
             pStrings.Add("\r\n");
diff --git a/tests/MSDIAL5/MsdialCoreTestApp/Parser/ConfigParser.cs b/tests/MSDIAL5/MsdialCoreTestApp/Parser/ConfigParser.cs
index bea6f4d93..0ba9829be 100644
--- a/tests/MSDIAL5/MsdialCoreTestApp/Parser/ConfigParser.cs
+++ b/tests/MSDIAL5/MsdialCoreTestApp/Parser/ConfigParser.cs
@@ -617,7 +617,7 @@ public static bool ReadCommonParameter(ParameterBase param, string method, strin
                         }
                     }
                     return true;
-                case "rt correction peak selection file path": param.RtCorrectionPeakSelectionFilePath = value; return true;
+                case "rt correction peak selection file path": param.ReferenceFileParam.RtCorrectionPeakSelectionFilePath = value; return true;
 
                 // Private version
                 case "is private version of tada":
diff --git a/tests/MSDIAL5/MsdialCoreTestApp/Process/EicProcess.cs b/tests/MSDIAL5/MsdialCoreTestApp/Process/EicProcess.cs
index 648107fae..94f6268be 100644
--- a/tests/MSDIAL5/MsdialCoreTestApp/Process/EicProcess.cs
+++ b/tests/MSDIAL5/MsdialCoreTestApp/Process/EicProcess.cs
@@ -131,7 +131,7 @@ public int RunRtCorrection(
             parameter.IonMode = ionMode;
             parameter.CompoundListForRtCorrectionPath = libraryFile.FullName;
             parameter.RetentionTimeCorrectionCommon.RetentionTimeCorrectionParam.ExcuteRtCorrection = true;
-            parameter.RtCorrectionPeakSelectionFilePath = selectionFile?.FullName ?? string.Empty;
+            parameter.ReferenceFileParam.RtCorrectionPeakSelectionFilePath = selectionFile?.FullName ?? string.Empty;
             var analysisFiles = CreateRtCorrectionAnalysisFiles(rawFiles, acquisitionType, outputFile.FullName);
             RetentionTimeCorrectionProcess.Prepare(
                 analysisFiles,
diff --git a/tests/MSDIAL5/MsdialCoreTestApp/Process/RetentionTimeCorrectionProcess.cs b/tests/MSDIAL5/MsdialCoreTestApp/Process/RetentionTimeCorrectionProcess.cs
index ea739a0fc..7df4368f9 100644
--- a/tests/MSDIAL5/MsdialCoreTestApp/Process/RetentionTimeCorrectionProcess.cs
+++ b/tests/MSDIAL5/MsdialCoreTestApp/Process/RetentionTimeCorrectionProcess.cs
@@ -53,9 +53,9 @@ public static void Prepare(IReadOnlyList<AnalysisFileBean> analysisFiles, Parame
         }
 
         Directory.CreateDirectory(outputFolder);
-        var selectionInput = parameter.RtCorrectionPeakSelectionFilePath;
+        var selectionInput = parameter.ReferenceFileParam.RtCorrectionPeakSelectionFilePath;
         var detectedRts = SnapshotDetectedRetentionTimes(analysisFiles);
-        if (!selectionInput.IsEmptyOrNull()) {
+        if (!string.IsNullOrEmpty(selectionInput)) {
             ApplySelectionFile(selectionInput, analysisFiles, parameter.RetentionTimeCorrectionCommon);
         }
         else {