diff --git a/vyper/codegen/external_call.py b/vyper/codegen/external_call.py
index b1139c32c0..aa10d3d927 100644
--- a/vyper/codegen/external_call.py
+++ b/vyper/codegen/external_call.py
@@ -20,7 +20,7 @@
 from vyper.codegen.ir_node import Encoding, IRnode
 from vyper.evm.address_space import MEMORY
 from vyper.exceptions import TypeCheckFailure
-from vyper.semantics.types import InterfaceT, TupleT, VOID_TYPE
+from vyper.semantics.types import VOID_TYPE, InterfaceT, TupleT
 from vyper.semantics.types.function import StateMutability