diff --git a/tools/releasetools/rangelib.py b/tools/releasetools/rangelib.py
index 075b7091f..975a48a45 100644
--- a/tools/releasetools/rangelib.py
+++ b/tools/releasetools/rangelib.py
@@ -24,7 +24,6 @@ class RangeSet(object):
   lots of runs."""
 
   def __init__(self, data=None):
-    # TODO(tbao): monotonic is broken when passing in a tuple.
     self.monotonic = False
     if isinstance(data, str):
       self._parse_internal(data)