--- old/make/src/classes/build/tools/tzdb/TzdbZoneRulesCompiler.java	2015-04-20 00:30:00.426821082 +0100
+++ new/make/src/classes/build/tools/tzdb/TzdbZoneRulesCompiler.java	2015-04-20 00:30:00.183821480 +0100
@@ -66,7 +66,7 @@
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
-import java.util.HashSet;
+import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.NoSuchElementException;
@@ -257,7 +257,7 @@
                 out.writeUTF(regionId);
             }
             // rules  -- hashset -> remove the dup
-            List<ZoneRules> rulesList = new ArrayList<>(new HashSet<>(builtZones.values()));
+            List<ZoneRules> rulesList = new ArrayList<>(new LinkedHashSet<>(builtZones.values()));
             out.writeShort(rulesList.size());
             ByteArrayOutputStream baos = new ByteArrayOutputStream(1024);
             for (ZoneRules rules : rulesList) {