diff --git a/vyper/ir/bb_optimizer.py b/vyper/ir/bb_optimizer.py
index c4f5ca56a4..ff4fb00dee 100644
--- a/vyper/ir/bb_optimizer.py
+++ b/vyper/ir/bb_optimizer.py
@@ -1,3 +1,4 @@
+# REVIEW: move this to vyper/venom/
 from vyper.utils import OrderedSet, ir_pass
 from vyper.venom.basicblock import BB_TERMINATORS, IRBasicBlock, IRInstruction, IRLabel
 from vyper.venom.function import IRFunction
diff --git a/vyper/ir/ir_to_bb_pass.py b/vyper/ir/ir_to_bb_pass.py
index df3522a2c6..170ebe2369 100644
--- a/vyper/ir/ir_to_bb_pass.py
+++ b/vyper/ir/ir_to_bb_pass.py
@@ -1,3 +1,4 @@
+# REVIEW: move to vyper/venom/
 from typing import Optional
 
 from vyper.codegen.ir_node import IRnode