diff --git a/transport-classes-kqueue/src/main/java/io/netty/channel/kqueue/KQueueChannelConfig.java b/transport-classes-kqueue/src/main/java/io/netty/channel/kqueue/KQueueChannelConfig.java
index 4f5ff99e3c4..e3d870c6137 100644
--- a/transport-classes-kqueue/src/main/java/io/netty/channel/kqueue/KQueueChannelConfig.java
+++ b/transport-classes-kqueue/src/main/java/io/netty/channel/kqueue/KQueueChannelConfig.java
@@ -67,7 +67,7 @@ public <T> T getOption(ChannelOption<T> option) {
             }
             if (option instanceof RawUnixChannelOption) {
                 RawUnixChannelOption opt = (RawUnixChannelOption) option;
-                ByteBuffer out = ByteBuffer.allocate(opt.level());
+                ByteBuffer out = ByteBuffer.allocate(opt.length());
                 ((AbstractKQueueChannel) channel).socket.getRawOpt(opt.level(), opt.optname(), out);
                 return (T) out.flip();
             }