diff --git a/netwerk/protocol/http/ASpdySession.cpp b/netwerk/protocol/http/ASpdySession.cpp
index d1fdf5a1685c..6371faf771ba 100644
--- a/netwerk/protocol/http/ASpdySession.cpp
+++ b/netwerk/protocol/http/ASpdySession.cpp
@@ -82,8 +82,12 @@ SpdyInformation::SpdyInformation()
   ALPNCallbacks[2] = Http2Session::ALPNCallback;
 
   Version[3] = NS_HTTP2_DRAFT_VERSION;
-  VersionString[3] = NS_LITERAL_CSTRING(NS_HTTP2_DRAFT_TOKEN);
+  VersionString[3] = NS_LITERAL_CSTRING("h2-15");
   ALPNCallbacks[3] = Http2Session::ALPNCallback;
+
+  Version[4] = NS_HTTP2_DRAFT_VERSION;
+  VersionString[4] = NS_LITERAL_CSTRING(NS_HTTP2_DRAFT_TOKEN);
+  ALPNCallbacks[4] = Http2Session::ALPNCallback;
 }
 
 bool
@@ -98,6 +102,7 @@ SpdyInformation::ProtocolEnabled(uint32_t index) const
     return gHttpHandler->IsHttp2Enabled();
   case 2:
   case 3:
+  case 4:
     return gHttpHandler->IsHttp2DraftEnabled();
   }
   return false;
diff --git a/netwerk/protocol/http/ASpdySession.h b/netwerk/protocol/http/ASpdySession.h
index c7a19223cd3e..d553f7f80ce0 100644
--- a/netwerk/protocol/http/ASpdySession.h
+++ b/netwerk/protocol/http/ASpdySession.h
@@ -74,7 +74,7 @@ public:
   SpdyInformation();
   ~SpdyInformation() {}
 
-  static const uint32_t kCount = 4;
+  static const uint32_t kCount = 5;
 
   // determine the index (0..kCount-1) of the spdy information that
   // correlates to the npn string. NS_FAILED() if no match is found.
diff --git a/netwerk/protocol/http/nsHttp.h b/netwerk/protocol/http/nsHttp.h
index 6c5419e72217..ede634e5c7f5 100644
--- a/netwerk/protocol/http/nsHttp.h
+++ b/netwerk/protocol/http/nsHttp.h
@@ -39,15 +39,15 @@ namespace net {
         // 27 was http/2-draft09, h2-10, and h2-11
         // 28 was http/2-draft12
         // 29 was http/2-draft13
-        // 30 was also h2-14. They're effectively the same, -15 just adds one
-        // error code. So, we advertise both, but our "default position" is -15.
-        HTTP2_VERSION_DRAFT15 = 30
+        // 30 was also h2-14 and -15. They're effectively the same, -15 added an
+        // error code. So, we advertise all, but our "default position" is -16.
+        HTTP2_VERSION_DRAFT16 = 30
     };
 
 typedef uint8_t nsHttpVersion;
 
-#define NS_HTTP2_DRAFT_VERSION HTTP2_VERSION_DRAFT15
-#define NS_HTTP2_DRAFT_TOKEN "h2-15"
+#define NS_HTTP2_DRAFT_VERSION HTTP2_VERSION_DRAFT16
+#define NS_HTTP2_DRAFT_TOKEN "h2-16"
 
 //-----------------------------------------------------------------------------
 // http connection capabilities
diff --git a/netwerk/test/unit/test_http2.js b/netwerk/test/unit/test_http2.js
index 0d796a4fbfd3..155c60e75add 100644
--- a/netwerk/test/unit/test_http2.js
+++ b/netwerk/test/unit/test_http2.js
@@ -25,7 +25,7 @@ var bigListenerMD5 = '8f607cfdd2c87d6a7eedb657dafbd836';
 
 function checkIsHttp2(request) {
   try {
-    if (request.getResponseHeader("X-Firefox-Spdy") == "h2-15") {
+    if (request.getResponseHeader("X-Firefox-Spdy") == "h2-16") {
       if (request.getResponseHeader("X-Connection-Http2") == "yes") {
         return true;
       }
@@ -378,7 +378,7 @@ var altsvcClientListener = {
 function altsvcHttp1Server(metadata, response) {
   response.setStatusLine(metadata.httpVersion, 200, "OK");
   response.setHeader("Content-Type", "text/plain", false);
-  response.setHeader("Alt-Svc", 'h2-15=":6944"', false);
+  response.setHeader("Alt-Svc", 'h2-16=":6944"', false);
   var body = "this is where a cool kid would write something neat.\n";
   response.bodyOutputStream.write(body, body.length);
 }
diff --git a/testing/xpcshell/node-http2/lib/protocol/index.js b/testing/xpcshell/node-http2/lib/protocol/index.js
index fab2015fcf60..c655f4b251bc 100644
--- a/testing/xpcshell/node-http2/lib/protocol/index.js
+++ b/testing/xpcshell/node-http2/lib/protocol/index.js
@@ -37,7 +37,7 @@
 // [node-https]:          http://nodejs.org/api/https.html
 // [node-http]:           http://nodejs.org/api/http.html
 
-exports.VERSION = 'h2-15';
+exports.VERSION = 'h2-16';
 
 exports.Endpoint = require('./endpoint').Endpoint;