diff --git a/core/src/apps/cardano/seed.py b/core/src/apps/cardano/seed.py
index e44570098..d09033c54 100644
--- a/core/src/apps/cardano/seed.py
+++ b/core/src/apps/cardano/seed.py
@@ -47,14 +47,10 @@ async def get_keychain(ctx: wire.Context) -> Keychain:
             seed = mnemonic.get_seed(passphrase)
             root = bip32.from_seed(seed, "ed25519 cardano seed")
 
+        # derive the namespaced root node
+        for i in SEED_NAMESPACE:
+            root.derive_cardano(i)
         storage.cache.set(cache.APP_CARDANO_ROOT, root)
 
-    # let's not modify the one in the cache
-    root = root.clone()
-
-    # derive the namespaced root node
-    for i in SEED_NAMESPACE:
-        root.derive_cardano(i)
-
     keychain = Keychain(SEED_NAMESPACE, root)
     return keychain