diff --git a/content/html/content/public/nsHTMLMediaElement.h b/content/html/content/public/nsHTMLMediaElement.h
index 8d73d075e48..473307f3a3e 100644
--- a/content/html/content/public/nsHTMLMediaElement.h
+++ b/content/html/content/public/nsHTMLMediaElement.h
@@ -298,7 +298,7 @@ public:
   static bool IsH264Enabled();
   static bool IsH264Type(const nsACString& aType);
   static const char gH264Types[3][17];
-  static char const *const gH264Codecs[6];
+  static char const *const gH264Codecs[7];
 #endif
 
 #ifdef MOZ_MEDIA_PLUGINS
diff --git a/content/html/content/src/nsHTMLMediaElement.cpp b/content/html/content/src/nsHTMLMediaElement.cpp
index f797733bac5..0670470a66e 100644
--- a/content/html/content/src/nsHTMLMediaElement.cpp
+++ b/content/html/content/src/nsHTMLMediaElement.cpp
@@ -2081,8 +2081,9 @@ const char nsHTMLMediaElement::gH264Types[3][17] = {
   "video/quicktime",
 };
 
-char const *const nsHTMLMediaElement::gH264Codecs[6] = {
+char const *const nsHTMLMediaElement::gH264Codecs[7] = {
   "avc1.42E01E",
+  "avc1.42001E",
   "avc1.58A01E",
   "avc1.4D401E",
   "avc1.64001E",