diff --git a/core/src/trezor/wire/thp/channel.py b/core/src/trezor/wire/thp/channel.py
index 38fdb6a9c..aad76c222 100644
--- a/core/src/trezor/wire/thp/channel.py
+++ b/core/src/trezor/wire/thp/channel.py
@@ -24,7 +24,12 @@ from .thp_messages import (
     InitHeader,
 )
 from .thp_session import ThpError
-from .writer import write_payload_to_wire
+from .writer import (
+    CONT_DATA_OFFSET,
+    INIT_DATA_OFFSET,
+    REPORT_LENGTH,
+    write_payload_to_wire,
+)
 
 if TYPE_CHECKING:
     from trezorio import WireInterface  # pyright:ignore[reportMissingImports]
@@ -35,12 +40,9 @@ _MOCK_INTERFACE_HID = b"\x00"
 
 _PUBKEY_LENGTH = const(32)
 
-INIT_DATA_OFFSET = const(5)
-CONT_DATA_OFFSET = const(3)
 
 MESSAGE_TYPE_LENGTH = const(2)
 
-REPORT_LENGTH = const(64)
 MAX_PAYLOAD_LEN = const(60000)
 
 
diff --git a/core/src/trezor/wire/thp/writer.py b/core/src/trezor/wire/thp/writer.py
index 24e5b09bc..7acd425e6 100644
--- a/core/src/trezor/wire/thp/writer.py
+++ b/core/src/trezor/wire/thp/writer.py
@@ -1,9 +1,13 @@
+from micropython import const  # pyright: ignore[reportMissingModuleSource]
 from typing import TYPE_CHECKING  # pyright: ignore[reportShadowedImports]
 
 from trezor import io, log, loop, utils
-from trezor.wire.thp.channel import CONT_DATA_OFFSET, INIT_DATA_OFFSET, REPORT_LENGTH
 from trezor.wire.thp.thp_messages import InitHeader
 
+INIT_DATA_OFFSET = const(5)
+CONT_DATA_OFFSET = const(3)
+REPORT_LENGTH = const(64)
+
 if TYPE_CHECKING:
     from trezorio import WireInterface  # pyright: ignore[reportMissingImports]