diff --git a/logging/rtc_event_log/events/rtc_event_generic_ack_received.h b/logging/rtc_event_log/events/rtc_event_generic_ack_received.h
index 7d42bbd..79bcd34 100644
--- a/logging/rtc_event_log/events/rtc_event_generic_ack_received.h
+++ b/logging/rtc_event_log/events/rtc_event_generic_ack_received.h
@@ -50,10 +50,6 @@
   int64_t acked_packet_number() const { return acked_packet_number_; }
 
   // Timestamp when the |acked_packet_number| was received by the remote side.
-  absl::optional<int64_t> receive_timestamp_ms() const {
-    return receive_acked_packet_time_ms_;
-  }
-
   absl::optional<int64_t> receive_acked_packet_time_ms() const {
     return receive_acked_packet_time_ms_;
   }