diff --git a/mypy/checker.py b/mypy/checker.py
index 751af3081e9c..affc5280b57e 100644
--- a/mypy/checker.py
+++ b/mypy/checker.py
@@ -115,6 +115,7 @@
     RaiseStmt,
     RefExpr,
     ReturnStmt,
+    SetExpr,
     StarExpr,
     Statement,
     StrExpr,
@@ -133,7 +134,6 @@
     WithStmt,
     YieldExpr,
     is_final_node,
-    SetExpr,
 )
 from mypy.operators import flip_ops, int_op_to_method, neg_ops
 from mypy.options import PRECISE_TUPLE_TYPES, Options