diff --git a/classpath/java/io/RandomAccessFile.java b/classpath/java/io/RandomAccessFile.java
index a2f40bce76..f5a3602bf1 100644
--- a/classpath/java/io/RandomAccessFile.java
+++ b/classpath/java/io/RandomAccessFile.java
@@ -56,6 +56,8 @@ public class RandomAccessFile {
       throw new ArrayIndexOutOfBoundsException();
 
     copy(peer, position, buffer, offset, length);
+
+    position += length;
   }
 
   private static native void copy(long peer, long position, byte[] buffer,