diff --git a/core/embed/rust/src/protobuf/obj.rs b/core/embed/rust/src/protobuf/obj.rs
index 7b4c69033..fc3a1f3a1 100644
--- a/core/embed/rust/src/protobuf/obj.rs
+++ b/core/embed/rust/src/protobuf/obj.rs
@@ -356,7 +356,7 @@ pub static mp_module_trezorproto: Module = obj_module! {
     ///     """Calculate length of encoding of the specified message."""
     Qstr::MP_QSTR_encoded_length => obj_fn_1!(protobuf_len).as_obj(),
 
-    /// def encode(buffer: bytearray, msg: MessageType) -> int:
+    /// def encode(buffer: bytearray | memoryview, msg: MessageType) -> int:
     ///     """Encode the message into the specified buffer. Return length of
     ///     encoding."""
     Qstr::MP_QSTR_encode => obj_fn_2!(protobuf_encode).as_obj()
diff --git a/core/mocks/generated/trezorproto.pyi b/core/mocks/generated/trezorproto.pyi
index ee7c9eb72..530ef0963 100644
--- a/core/mocks/generated/trezorproto.pyi
+++ b/core/mocks/generated/trezorproto.pyi
@@ -42,6 +42,6 @@ def encoded_length(msg: MessageType) -> int:
 
 
 # rust/src/protobuf/obj.rs
-def encode(buffer: bytearray, msg: MessageType) -> int:
+def encode(buffer: bytearray | memoryview, msg: MessageType) -> int:
     """Encode the message into the specified buffer. Return length of
     encoding."""