diff --git a/runtime/Python2/src/antlr4/IntervalSet.py b/runtime/Python2/src/antlr4/IntervalSet.py
index fef2b46014..8ccd78ab5e 100644
--- a/runtime/Python2/src/antlr4/IntervalSet.py
+++ b/runtime/Python2/src/antlr4/IntervalSet.py
@@ -164,7 +164,7 @@ def removeOne(self, v):
                 # split existing range
                 elif v<i.stop-1:
                     x = Interval(i.start, v)
-                    self.intervals[k] = range(v + 1, i.stop)
+                    self.intervals[k] = Interval(v + 1, i.stop)
                     self.intervals.insert(k, x)
                     return
                 k += 1