diff --git a/changelogs/client_server/newsfragments/1164.clarification b/changelogs/client_server/newsfragments/1164.clarification
new file mode 100644
index 00000000..3ccb2333
--- /dev/null
+++ b/changelogs/client_server/newsfragments/1164.clarification
@@ -0,0 +1 @@
+Fix various typos throughout the specification.
diff --git a/data/api/client-server/cross_signing.yaml b/data/api/client-server/cross_signing.yaml
index 603d88fd..b88da999 100644
--- a/data/api/client-server/cross_signing.yaml
+++ b/data/api/client-server/cross_signing.yaml
@@ -168,7 +168,7 @@ paths:
                   "user_id": "@alice:example.com",
                   "device_id": "HIJKLMN",
                   "algorithms": [
-                    "m.olm.curve25519-aes-sha256",
+                    "m.olm.v1.curve25519-aes-sha256",
                     "m.megolm.v1.aes-sha"
                   ],
                   "keys": {