diff --git a/fastpair/rust/src/message_stream.rs b/fastpair/rust/src/message_stream.rs
index e7266fe4..5e535f44 100644
--- a/fastpair/rust/src/message_stream.rs
+++ b/fastpair/rust/src/message_stream.rs
@@ -12,7 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// https://source.corp.google.com/piper///depot/google3/third_party/nearby/fastpair/message_stream/message_stream.h
+// Specification: https://developers.google.com/nearby/fast-pair/specifications/extensions/messagestream
+// This file should be in sync with fastpair/message_stream/message_stream.h.
+
 use crate::types::packets::{MessageGroup, MessageStreamPacket};
 
 struct BatteryInfo {
diff --git a/fastpair/rust/src/types/packets.rs b/fastpair/rust/src/types/packets.rs
index 42e444e4..d62a3015 100644
--- a/fastpair/rust/src/types/packets.rs
+++ b/fastpair/rust/src/types/packets.rs
@@ -12,7 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// https://source.corp.google.com/piper///depot/google3/third_party/nearby/fastpair/message_stream/message.h
+// Specification: https://developers.google.com/nearby/fast-pair/specifications/extensions/messagestream
+// This file should be in sync with fastpair/message_stream/message.h.
+
 
 #[derive(Debug)]
 pub enum BluetoothCode {