1 files changed, 6 insertions, 2 deletions
diff --git a/java/com/tigervnc/rdr/MemInStream.java b/java/com/tigervnc/rdr/MemInStream.java
index 32911a3a..6a768aad 100644
--- a/java/com/tigervnc/rdr/MemInStream.java
+++ b/java/com/tigervnc/rdr/MemInStream.java
@@ -22,13 +22,17 @@ public class MemInStream extends InStream {
 
   public MemInStream(byte[] data, int offset, int len) {
     b = data;
-    ptr = offset;
-    end = offset + len;
+    start = offset;    
+    ptr = start;
+    end = start + len;
   }
 
   public int pos() { return ptr; }
+  public void reposition(int pos) { ptr = start + pos; }
 
   protected int overrun(int itemSize, int nItems, boolean wait) {
     throw new EndOfStream();
   }
+
+  int start;
 }