diff --git a/classpath/java/nio/ByteBuffer.java b/classpath/java/nio/ByteBuffer.java
index 79517343ab..1b72d70b2a 100644
--- a/classpath/java/nio/ByteBuffer.java
+++ b/classpath/java/nio/ByteBuffer.java
@@ -134,6 +134,8 @@ public class ByteBuffer {
   }
 
   public ByteBuffer flip() {
+    limit = position;
+    position = 0;
     return this;
   }