diff --git a/src/apps/wallet/sign_identity.py b/src/apps/wallet/sign_identity.py
index b915d550ae..e037bddbc6 100644
--- a/src/apps/wallet/sign_identity.py
+++ b/src/apps/wallet/sign_identity.py
@@ -2,7 +2,7 @@ from trezor import ui
 from trezor.crypto.hashlib import sha256
 from trezor.messages.SignedIdentity import SignedIdentity
 from ustruct import pack, unpack
-from trezor.utils import chunks
+from trezor.utils import chunks, serialize_identity
 from apps.common.confirm import require_confirm
 from trezor.ui.text import Text
 
@@ -51,21 +51,6 @@ async def require_confirm_sign_identity(ctx, identity, challenge_visual):
     await require_confirm(ctx, content)
 
 
-def serialize_identity(identity):
-    s = ''
-    if identity.proto:
-        s += identity.proto + '://'
-    if identity.user:
-        s += identity.user + '@'
-    if identity.host:
-        s += identity.host
-    if identity.port:
-        s += ':' + identity.port
-    if identity.path:
-        s += identity.path
-    return s
-
-
 def get_identity_path(identity: str, index: int):
     identity_hash = sha256(pack('<I', index) + identity).digest()
 
diff --git a/src/trezor/utils.py b/src/trezor/utils.py
index ca2eab057e..4e0d7ecdd5 100644
--- a/src/trezor/utils.py
+++ b/src/trezor/utils.py
@@ -64,6 +64,21 @@ def format_ordinal(number):
     return str(number) + {1: 'st', 2: 'nd', 3: 'rd'}.get(4 if 10 <= number % 100 < 20 else number % 10, 'th')
 
 
+def serialize_identity(identity):
+    s = ''
+    if identity.proto:
+        s += identity.proto + '://'
+    if identity.user:
+        s += identity.user + '@'
+    if identity.host:
+        s += identity.host
+    if identity.port:
+        s += ':' + identity.port
+    if identity.path:
+        s += identity.path
+    return s
+
+
 class HashWriter:
 
     def __init__(self, hashfunc):