diff --git a/crates/matrix-sdk/src/authentication.rs b/crates/matrix-sdk/src/authentication/mod.rs
similarity index 98%
rename from crates/matrix-sdk/src/authentication.rs
rename to crates/matrix-sdk/src/authentication/mod.rs
index ac19cb43b..5be3efd1b 100644
--- a/crates/matrix-sdk/src/authentication.rs
+++ b/crates/matrix-sdk/src/authentication/mod.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// TODO(pixlwave) Move AuthenticationService from the FFI into this module.
+// TODO:(pixlwave) Move AuthenticationService from the FFI into this module.
 
 use std::pin::Pin;