diff --git a/netwerk/protocol/http/nsHttp.cpp b/netwerk/protocol/http/nsHttp.cpp
index 3e1af6748572..e5f17df44393 100644
--- a/netwerk/protocol/http/nsHttp.cpp
+++ b/netwerk/protocol/http/nsHttp.cpp
@@ -28,7 +28,7 @@
 namespace mozilla {
 namespace net {
 
-const uint32_t kHttp3VersionCount = 4;
+const uint32_t kHttp3VersionCount = 6;
 const nsCString kHttp3Versions[] = {"h3-27"_ns, "h3-28"_ns, "h3-29"_ns,
                                     "h3-30"_ns, "h3-31"_ns, "h3-32"_ns};