diff --git a/webrtc/modules/rtp_rtcp/source/rtp_header_extensions.cc b/webrtc/modules/rtp_rtcp/source/rtp_header_extensions.cc
index 3bb9bc5..2f3feb3 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_header_extensions.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtp_header_extensions.cc
@@ -43,8 +43,9 @@
   return true;
 }
 
-bool AbsoluteSendTime::Write(uint8_t* data, int64_t time_ms) {
-  ByteWriter<uint32_t, 3>::WriteBigEndian(data, MsTo24Bits(time_ms));
+bool AbsoluteSendTime::Write(uint8_t* data, uint32_t time_24bits) {
+  RTC_DCHECK_LE(time_24bits, 0x00FFFFFF);
+  ByteWriter<uint32_t, 3>::WriteBigEndian(data, time_24bits);
   return true;
 }