diff --git a/packages/sdk38/src/cosmosclient.searchtx.spec.ts b/packages/sdk38/src/cosmosclient.searchtx.spec.ts
index cb6ca4de..eaad9abc 100644
--- a/packages/sdk38/src/cosmosclient.searchtx.spec.ts
+++ b/packages/sdk38/src/cosmosclient.searchtx.spec.ts
@@ -6,7 +6,6 @@ import { CosmosClient, isPostTxFailure } from "./cosmosclient";
 import { makeSignBytes } from "./encoding";
 import { LcdClient } from "./lcdapi";
 import { isMsgSend, MsgSend } from "./msgs";
-import { Secp256k1Pen } from "./pen";
 import { SigningCosmosClient } from "./signingcosmosclient";
 import {
   faucet,
@@ -17,6 +16,7 @@ import {
   wasmdEnabled,
 } from "./testutils.spec";
 import { CosmosSdkTx } from "./types";
+import { Secp256k1Pen } from "./wallet";
 
 interface TestTxSend {
   readonly sender: string;
diff --git a/packages/sdk38/src/cosmosclient.spec.ts b/packages/sdk38/src/cosmosclient.spec.ts
index 64d9806d..e84dc9e1 100644
--- a/packages/sdk38/src/cosmosclient.spec.ts
+++ b/packages/sdk38/src/cosmosclient.spec.ts
@@ -6,7 +6,6 @@ import { CosmosClient, isPostTxFailure, PrivateCosmWasmClient } from "./cosmoscl
 import { makeSignBytes } from "./encoding";
 import { findAttribute } from "./logs";
 import { MsgSend } from "./msgs";
-import { Secp256k1Pen } from "./pen";
 import cosmoshub from "./testdata/cosmoshub.json";
 import {
   faucet,
@@ -17,6 +16,7 @@ import {
   wasmd,
 } from "./testutils.spec";
 import { StdFee } from "./types";
+import { Secp256k1Pen } from "./wallet";
 
 const blockTime = 1_000; // ms
 
diff --git a/packages/sdk38/src/index.ts b/packages/sdk38/src/index.ts
index f7d21dc6..9074e9df 100644
--- a/packages/sdk38/src/index.ts
+++ b/packages/sdk38/src/index.ts
@@ -50,9 +50,9 @@ export {
   TxsResponse,
 } from "./lcdapi";
 export { isMsgDelegate, isMsgSend, Msg, MsgDelegate, MsgSend } from "./msgs";
-export { Pen, Secp256k1Pen, makeCosmoshubPath } from "./pen";
 export { decodeBech32Pubkey, encodeBech32Pubkey, encodeSecp256k1Pubkey } from "./pubkey";
 export { findSequenceForSignedTx } from "./sequence";
 export { encodeSecp256k1Signature, decodeSignature } from "./signature";
 export { FeeTable, SigningCallback, SigningCosmosClient } from "./signingcosmosclient";
 export { isStdTx, pubkeyType, CosmosSdkTx, PubKey, StdFee, StdSignature, StdTx } from "./types";
+export { Pen, Secp256k1Pen, makeCosmoshubPath } from "./wallet";
diff --git a/packages/sdk38/src/lcdapi/lcdclient.spec.ts b/packages/sdk38/src/lcdapi/lcdclient.spec.ts
index 627075e1..d73dfba7 100644
--- a/packages/sdk38/src/lcdapi/lcdclient.spec.ts
+++ b/packages/sdk38/src/lcdapi/lcdclient.spec.ts
@@ -7,7 +7,6 @@ import { isPostTxFailure } from "../cosmosclient";
 import { makeSignBytes } from "../encoding";
 import { parseLogs } from "../logs";
 import { MsgSend } from "../msgs";
-import { makeCosmoshubPath, Secp256k1Pen } from "../pen";
 import { SigningCosmosClient } from "../signingcosmosclient";
 import cosmoshub from "../testdata/cosmoshub.json";
 import {
@@ -21,6 +20,7 @@ import {
   wasmdEnabled,
 } from "../testutils.spec";
 import { StdFee } from "../types";
+import { makeCosmoshubPath, Secp256k1Pen } from "../wallet";
 import { setupAuthExtension } from "./auth";
 import { TxsResponse } from "./base";
 import { LcdApiArray, LcdClient, normalizeLcdApiArray } from "./lcdclient";
diff --git a/packages/sdk38/src/signingcosmosclient.spec.ts b/packages/sdk38/src/signingcosmosclient.spec.ts
index ece3473c..dd30c13a 100644
--- a/packages/sdk38/src/signingcosmosclient.spec.ts
+++ b/packages/sdk38/src/signingcosmosclient.spec.ts
@@ -2,9 +2,9 @@ import { assert } from "@cosmjs/utils";
 
 import { Coin } from "./coins";
 import { isPostTxFailure, PrivateCosmWasmClient } from "./cosmosclient";
-import { Secp256k1Pen } from "./pen";
 import { SigningCosmosClient } from "./signingcosmosclient";
 import { makeRandomAddress, pendingWithoutWasmd } from "./testutils.spec";
+import { Secp256k1Pen } from "./wallet";
 
 const httpUrl = "http://localhost:1317";
 
diff --git a/packages/sdk38/src/pen.spec.ts b/packages/sdk38/src/wallet.spec.ts
similarity index 97%
rename from packages/sdk38/src/pen.spec.ts
rename to packages/sdk38/src/wallet.spec.ts
index 89b37d1b..47bdc354 100644
--- a/packages/sdk38/src/pen.spec.ts
+++ b/packages/sdk38/src/wallet.spec.ts
@@ -1,8 +1,8 @@
 import { Secp256k1, Secp256k1Signature, Sha256 } from "@cosmjs/crypto";
 import { fromHex, toAscii } from "@cosmjs/encoding";
 
-import { Secp256k1Pen } from "./pen";
 import { decodeSignature } from "./signature";
+import { Secp256k1Pen } from "./wallet";
 
 describe("Sec256k1Pen", () => {
   it("can be constructed", async () => {
diff --git a/packages/sdk38/src/pen.ts b/packages/sdk38/src/wallet.ts
similarity index 100%
rename from packages/sdk38/src/pen.ts
rename to packages/sdk38/src/wallet.ts
diff --git a/packages/sdk38/types/index.d.ts b/packages/sdk38/types/index.d.ts
index fe529970..8210230f 100644
--- a/packages/sdk38/types/index.d.ts
+++ b/packages/sdk38/types/index.d.ts
@@ -48,9 +48,9 @@ export {
   TxsResponse,
 } from "./lcdapi";
 export { isMsgDelegate, isMsgSend, Msg, MsgDelegate, MsgSend } from "./msgs";
-export { Pen, Secp256k1Pen, makeCosmoshubPath } from "./pen";
 export { decodeBech32Pubkey, encodeBech32Pubkey, encodeSecp256k1Pubkey } from "./pubkey";
 export { findSequenceForSignedTx } from "./sequence";
 export { encodeSecp256k1Signature, decodeSignature } from "./signature";
 export { FeeTable, SigningCallback, SigningCosmosClient } from "./signingcosmosclient";
 export { isStdTx, pubkeyType, CosmosSdkTx, PubKey, StdFee, StdSignature, StdTx } from "./types";
+export { Pen, Secp256k1Pen, makeCosmoshubPath } from "./wallet";
diff --git a/packages/sdk38/types/pen.d.ts b/packages/sdk38/types/wallet.d.ts
similarity index 100%
rename from packages/sdk38/types/pen.d.ts
rename to packages/sdk38/types/wallet.d.ts