diff --git a/mypy/join.py b/mypy/join.py
index b80329792c96..f4af59f4e50b 100644
--- a/mypy/join.py
+++ b/mypy/join.py
@@ -29,7 +29,6 @@
     Parameters,
     ParamSpecType,
     PartialType,
-    PlaceholderType,
     ProperType,
     TupleType,
     Type,