diff --git a/overviewer_core/world.py b/overviewer_core/world.py
index 3ce42ff..19081c8 100644
--- a/overviewer_core/world.py
+++ b/overviewer_core/world.py
@@ -1469,6 +1469,15 @@ class RegionSetWrapper(object):
     def __init__(self, rsetobj):
         self._r = rsetobj
 
+    def __lt__(self, other):
+        """This garbage is only needed because genPOI wants to use
+        itertools.groupby, which needs sorted keys, and Python 2 somehow
+        just sorted objects like ???????? how????? why?????
+        """
+        if isinstance(other, RegionSetWrapper):
+            other = other._r
+        return self._r.regiondir < other.regiondir
+
     def get_type(self):
         return self._r.get_type()
     def get_biome_data(self, x, z):