diff --git a/src/vumi2/applications/turn_channels_api/turn_channels_api.py b/src/vumi2/applications/turn_channels_api/turn_channels_api.py
index 885232a..d03d291 100644
--- a/src/vumi2/applications/turn_channels_api/turn_channels_api.py
+++ b/src/vumi2/applications/turn_channels_api/turn_channels_api.py
@@ -194,7 +194,8 @@ async def http_send_message(self) -> dict[Any, Any]:
                         computed_signature = str(base64.b64encode(h))
                         signature = request.headers.get("X-Turn-Hook-Signature", "")
                         logger.info(
-                            f"Signature from Turn: {signature}. Computed: {computed_signature}"
+                            f"Signature from Turn: {signature}."
+                            "Computed: {computed_signature}"
                         )
                         if not hmac.compare_digest(computed_signature, signature):
                             raise SignatureMismatchError()