diff --git a/media/base/media_constants.cc b/media/base/media_constants.cc
index 5144a6e..0665602 100644
--- a/media/base/media_constants.cc
+++ b/media/base/media_constants.cc
@@ -107,6 +107,7 @@
 const char kVp9CodecName[] = "VP9";
 const char kAv1CodecName[] = "AV1X";
 const char kH264CodecName[] = "H264";
+const char kHEVCCodecName[] = "H265X";
 
 // RFC 6184 RTP Payload Format for H.264 video
 const char kH264FmtpProfileLevelId[] = "profile-level-id";
diff --git a/media/base/media_constants.h b/media/base/media_constants.h
index b9b8a33..a9c82e2 100644
--- a/media/base/media_constants.h
+++ b/media/base/media_constants.h
@@ -136,6 +136,7 @@
 RTC_EXPORT extern const char kVp9CodecName[];
 RTC_EXPORT extern const char kAv1CodecName[];
 RTC_EXPORT extern const char kH264CodecName[];
+RTC_EXPORT extern const char kHEVCCodecName[];
 
 // RFC 6184 RTP Payload Format for H.264 video
 RTC_EXPORT extern const char kH264FmtpProfileLevelId[];