diff --git a/crates/ruma-identity-service-api/CHANGELOG.md b/crates/ruma-identity-service-api/CHANGELOG.md
index 256fe117..5deb005d 100644
--- a/crates/ruma-identity-service-api/CHANGELOG.md
+++ b/crates/ruma-identity-service-api/CHANGELOG.md
@@ -1,5 +1,9 @@
 # [unreleased]
 
+Breaking changes:
+
+* Borrow `mxid` in `invitation::sign_invitation_ed25519::v2::Request`
+
 # 0.3.0
 
 Breaking changes:
diff --git a/crates/ruma-identity-service-api/src/invitation/sign_invitation_ed25519/v2.rs b/crates/ruma-identity-service-api/src/invitation/sign_invitation_ed25519/v2.rs
index 3440a9af..b1d90d83 100644
--- a/crates/ruma-identity-service-api/src/invitation/sign_invitation_ed25519/v2.rs
+++ b/crates/ruma-identity-service-api/src/invitation/sign_invitation_ed25519/v2.rs
@@ -15,7 +15,7 @@ ruma_api! {
 
     request: {
         /// The Matrix user ID of the user accepting the invitation.
-        pub mxid: UserId,
+        pub mxid: &'a UserId,
 
         /// The token from the call to store-invite.
         pub token: &'a str,
@@ -41,7 +41,7 @@ ruma_api! {
 
 impl<'a> Request<'a> {
     /// Creates a `Request` with the given Matrix user ID, token and private_key.
-    pub fn new(mxid: UserId, token: &'a str, private_key: &'a str) -> Self {
+    pub fn new(mxid: &'a UserId, token: &'a str, private_key: &'a str) -> Self {
         Self { mxid, token, private_key }
     }
 }