Index: generic/nsfInt.h
===================================================================
diff -u -r75383021cb9f2f2db883583779a02eef6f1801f5 -rcd7387dce218900697565aeabc0e58afb0294a6a
--- generic/nsfInt.h	(.../nsfInt.h)	(revision 75383021cb9f2f2db883583779a02eef6f1801f5)
+++ generic/nsfInt.h	(.../nsfInt.h)	(revision cd7387dce218900697565aeabc0e58afb0294a6a)
@@ -635,6 +635,7 @@
   Tcl_Obj *methods[NSF_s_set_idx+1];
   Tcl_Obj *handles[NSF_s_set_idx+1];
   struct NsfObjectSystem *nextPtr;
+  char protected[NSF_s_set_idx+1];
 } NsfObjectSystem;