diff --git a/Core/src/org/sleuthkit/autopsy/modules/interestingitems/FilesSetDefsPanel.java b/Core/src/org/sleuthkit/autopsy/modules/interestingitems/FilesSetDefsPanel.java
index d226e6765b..25db05decb 100644
--- a/Core/src/org/sleuthkit/autopsy/modules/interestingitems/FilesSetDefsPanel.java
+++ b/Core/src/org/sleuthkit/autopsy/modules/interestingitems/FilesSetDefsPanel.java
@@ -22,6 +22,8 @@ import java.awt.EventQueue;
 import java.io.File;
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Collections;
+import java.util.Comparator;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -295,8 +297,14 @@ public final class FilesSetDefsPanel extends IngestModuleGlobalSettingsPanel imp
                 FilesSetDefsPanel.this.copySetButton.setEnabled(canBeEnabled);
                 FilesSetDefsPanel.this.exportSetButton.setEnabled(true);
                 // Populate the rule definitions list, sorted by name.
-                TreeMap<String, FilesSet.Rule> rules = new TreeMap<>(selectedSet.getRules());
-                rules.values().forEach((rule) -> {
+                List<FilesSet.Rule> rules = new ArrayList<>(selectedSet.getRules().values());
+                Collections.sort(rules, new Comparator<FilesSet.Rule>() {
+                    @Override
+                    public int compare(FilesSet.Rule rule1, FilesSet.Rule rule2) {
+                        return rule1.toString().compareTo(rule2.toString());
+                    }
+                });
+                rules.forEach((rule) -> {
                     FilesSetDefsPanel.this.rulesListModel.addElement(rule);
                 });
                 // Select the first rule by default.