diff --git a/pwiz_tools/Skyline/Model/Lib/BiblioSpecLite.cs b/pwiz_tools/Skyline/Model/Lib/BiblioSpecLite.cs
index 28c3b5bfeb..cf8be83cc9 100644
--- a/pwiz_tools/Skyline/Model/Lib/BiblioSpecLite.cs
+++ b/pwiz_tools/Skyline/Model/Lib/BiblioSpecLite.cs
@@ -367,7 +367,7 @@ LEFT JOIN (SELECT rsInner.fileId, rsInner.scoreType AS scoreType, COUNT(DISTINCT
                                     ? Convert.ToDouble(reader.GetValue(icolCutoffScore))
                                     : (double?)null;
 
-                                if (!string.IsNullOrEmpty(scoreName))
+                                if (!string.IsNullOrEmpty(scoreName) && ScoreType.INVARIANT_NAMES.Contains(scoreName))
                                 {
                                     var scoreType = new ScoreType(scoreName, probabilityType);
                                     sourceFileDetails.ScoreThresholds[scoreType] = cutoffScore;