diff --git a/src/main/java/io/vertx/core/Vertx.java b/src/main/java/io/vertx/core/Vertx.java
index e736d7cb748..f70e68bb164 100644
--- a/src/main/java/io/vertx/core/Vertx.java
+++ b/src/main/java/io/vertx/core/Vertx.java
@@ -676,8 +676,10 @@ default <T> void executeBlocking(Handler<Promise<T>> blockingCodeHandler, Handle
    * Return the Netty EventLoopGroup used by Vert.x
    *
    * @return the EventLoopGroup
+   * @deprecated removed from public API in Vert.x 5
    */
   @GenIgnore(GenIgnore.PERMITTED_TYPE)
+  @Deprecated
   EventLoopGroup nettyEventLoopGroup();
 
   /**
diff --git a/src/main/java/io/vertx/core/buffer/Buffer.java b/src/main/java/io/vertx/core/buffer/Buffer.java
index 1b919d96809..61497695646 100644
--- a/src/main/java/io/vertx/core/buffer/Buffer.java
+++ b/src/main/java/io/vertx/core/buffer/Buffer.java
@@ -110,7 +110,9 @@ static Buffer buffer(byte[] bytes) {
    *
    * @param byteBuf the Netty ByteBuf
    * @return the buffer
+   * @deprecated removed from public API in Vert.x 5
    */
+  @Deprecated
   @GenIgnore(GenIgnore.PERMITTED_TYPE)
   static Buffer buffer(ByteBuf byteBuf) {
     Objects.requireNonNull(byteBuf);
@@ -705,7 +707,10 @@ default Object toJson() {
    * Returns the Buffer as a Netty {@code ByteBuf}.
    *
    * <p> The returned buffer is a duplicate that maintain its own indices.
+   *
+   * @deprecated removed from public API in Vert.x 5
    */
+  @Deprecated
   @GenIgnore(GenIgnore.PERMITTED_TYPE)
   ByteBuf getByteBuf();
 
diff --git a/src/main/java/io/vertx/core/impl/VertxInternal.java b/src/main/java/io/vertx/core/impl/VertxInternal.java
index 69a1124e76c..04e38221a4a 100644
--- a/src/main/java/io/vertx/core/impl/VertxInternal.java
+++ b/src/main/java/io/vertx/core/impl/VertxInternal.java
@@ -15,6 +15,7 @@
 import io.netty.channel.EventLoop;
 import io.netty.channel.EventLoopGroup;
 import io.netty.resolver.AddressResolverGroup;
+import io.vertx.codegen.annotations.GenIgnore;
 import io.vertx.core.*;
 import io.vertx.core.http.HttpClient;
 import io.vertx.core.http.HttpClientOptions;
diff --git a/src/test/java/io/vertx/core/dns/HostnameResolutionTest.java b/src/test/java/io/vertx/core/dns/HostnameResolutionTest.java
index fcefa5d7999..a5ed8f9fec3 100644
--- a/src/test/java/io/vertx/core/dns/HostnameResolutionTest.java
+++ b/src/test/java/io/vertx/core/dns/HostnameResolutionTest.java
@@ -327,7 +327,7 @@ public void testAsyncResolveConnectIsNotifiedOnChannelEventLoop() throws Excepti
       CountDownLatch connectLatch = new CountDownLatch(1);
       Bootstrap bootstrap = new Bootstrap();
       bootstrap.channelFactory(((VertxInternal)vertx).transport().channelFactory(false));
-      bootstrap.group(vertx.nettyEventLoopGroup());
+      bootstrap.group(((VertxInternal) vertx).getEventLoopGroup());
       bootstrap.resolver(((VertxInternal) vertx).nettyAddressResolverGroup());
       bootstrap.handler(new ChannelInitializer<Channel>() {
         @Override