diff --git a/server/src/main/scala/org/http4s/netty/server/NettyServerBuilder.scala b/server/src/main/scala/org/http4s/netty/server/NettyServerBuilder.scala
index 80a8368d..d8b95a03 100644
--- a/server/src/main/scala/org/http4s/netty/server/NettyServerBuilder.scala
+++ b/server/src/main/scala/org/http4s/netty/server/NettyServerBuilder.scala
@@ -187,6 +187,8 @@ final class NettyServerBuilder[F[_]] private (
     copy(serviceErrorHandler = handler)
   def withNettyChannelOptions(opts: NettyChannelOptions): Self =
     copy(nettyChannelOptions = opts)
+  def withWebSocketMaxFrameLength(wsMaxFrameLength: Int): Self =
+    copy(wsMaxFrameLength = wsMaxFrameLength)
   def withWebSocketCompression: Self = copy(wsCompression = true)
   def withoutWebSocketCompression: Self = copy(wsCompression = false)