diff --git a/spring-websocket/src/main/java/org/springframework/web/socket/adapter/jetty/JettyWebSocketHandlerAdapter.java b/spring-websocket/src/main/java/org/springframework/web/socket/adapter/jetty/JettyWebSocketHandlerAdapter.java
index af62342431b..5254abc4725 100644
--- a/spring-websocket/src/main/java/org/springframework/web/socket/adapter/jetty/JettyWebSocketHandlerAdapter.java
+++ b/spring-websocket/src/main/java/org/springframework/web/socket/adapter/jetty/JettyWebSocketHandlerAdapter.java
@@ -118,8 +118,9 @@ public class JettyWebSocketHandlerAdapter {
 	}
 
 	private static ByteBuffer copyByteBuffer(ByteBuffer src) {
-		ByteBuffer dest = ByteBuffer.allocate(src.capacity());
-		dest.put(0, src, 0, src.remaining());
+		ByteBuffer dest = ByteBuffer.allocate(src.remaining());
+		dest.put(src);
+		dest.flip();
 		return dest;
 	}