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diff --git a/doc/orb/parameter-info-block b/doc/orb/parameter-info-block
index a39372b..c4f1768 100644
--- a/doc/orb/parameter-info-block
+++ b/doc/orb/parameter-info-block
@@ -24,7 +24,9 @@ Parameter Info Block (PIB)
       This is like buffer_size, but for Copy segments.
 
    objlist_ptr     pointer Pointer to the object list
+   newobj_ptr      pointer Pointer to the new object list.
    objlist_len     32-bit  Length of the object list, in IDs
+   newobj_len      32-bit  Length of the new object list, in entries.
 
       The object list is a special segment that contains object IDs
       rather than arbitrary data.  Each object ID will be translated
@@ -33,6 +35,12 @@ Parameter Info Block (PIB)
       regardless of the pointer size.  The first object in the list
       is the object to receive the message.
 
+      Objects which live in this address space have the high bit
+      clear; remote objects have the high bit set.  When sending an
+      object reference that has not been exposed to the kernel
+      before, its interface hash (SHA-1 of interface GUIDs) should
+      exist in the newobj list.
+
    num_segments    32-bit  Number of data segments
 
    segment.ptr     pointer Pointer to data segment