diff --git a/Headers/gnustep/base/Coder.h b/Headers/gnustep/base/Coder.h
index 2adeacfcb..b68417331 100644
--- a/Headers/gnustep/base/Coder.h
+++ b/Headers/gnustep/base/Coder.h
@@ -43,7 +43,11 @@
   Dictionary *const_ptr_table;       /* read/written const *'s */
   Stack *root_object_tables;         /* Stack of Dicts for interconnt'd objs */
   Stack *forward_object_tables;      /* Stack of Dictionaries for frwd refs */
-  Set *in_progress_table;     /* objects started r/w, but !finished */
+  Set *in_progress_table;            /* objects started r/w, but !finished */
+  int interconnected_stack_height    /* number of nested root objects */
+
+    /* Not all these ivars are really necessary.  I fixed a bug with
+       a quick fix; now I need to go back and clean it up. -mccallum */
 }
 
 + (void) setDefaultStreamClass: sc;
diff --git a/Source/objects/Coder.h b/Source/objects/Coder.h
index 2adeacfcb..b68417331 100644
--- a/Source/objects/Coder.h
+++ b/Source/objects/Coder.h
@@ -43,7 +43,11 @@
   Dictionary *const_ptr_table;       /* read/written const *'s */
   Stack *root_object_tables;         /* Stack of Dicts for interconnt'd objs */
   Stack *forward_object_tables;      /* Stack of Dictionaries for frwd refs */
-  Set *in_progress_table;     /* objects started r/w, but !finished */
+  Set *in_progress_table;            /* objects started r/w, but !finished */
+  int interconnected_stack_height    /* number of nested root objects */
+
+    /* Not all these ivars are really necessary.  I fixed a bug with
+       a quick fix; now I need to go back and clean it up. -mccallum */
 }
 
 + (void) setDefaultStreamClass: sc;