diff --git a/media/base/media_constants.cc b/media/base/media_constants.cc
index 03679d9627..a918078dd8 100644
--- a/media/base/media_constants.cc
+++ b/media/base/media_constants.cc
@@ -112,6 +112,7 @@ const char kH264FmtpLevelAsymmetryAllowed[] = "level-asymmetry-allowed";
 const char kH264FmtpPacketizationMode[] = "packetization-mode";
 const char kH264FmtpSpropParameterSets[] = "sprop-parameter-sets";
 const char kH264ProfileLevelConstrainedBaseline[] = "42e01f";
+const char kH264ProfileLevelConstrainedHigh[] = "640c1f";
 
 const int kDefaultVideoMaxFramerate = 60;
 
diff --git a/media/base/media_constants.h b/media/base/media_constants.h
index d2bfb36ee9..5579b6e00c 100644
--- a/media/base/media_constants.h
+++ b/media/base/media_constants.h
@@ -138,6 +138,7 @@ RTC_EXPORT extern const char kH264FmtpLevelAsymmetryAllowed[];
 RTC_EXPORT extern const char kH264FmtpPacketizationMode[];
 extern const char kH264FmtpSpropParameterSets[];
 extern const char kH264ProfileLevelConstrainedBaseline[];
+extern const char kH264ProfileLevelConstrainedHigh[];
 
 extern const int kDefaultVideoMaxFramerate;