Index: generic/nsf.c
===================================================================
diff -u -r7992ec41920e312596d965930cd2d1ad643e7fb5 -r371e0e38e4601fd512d0d2e6bb4b78f2598ede62
--- generic/nsf.c	(.../nsf.c)	(revision 7992ec41920e312596d965930cd2d1ad643e7fb5)
+++ generic/nsf.c	(.../nsf.c)	(revision 371e0e38e4601fd512d0d2e6bb4b78f2598ede62)
@@ -4069,7 +4069,8 @@
 
   /* now, turn of filters, all destroy callbacks are done */
   RUNTIME_STATE(interp)->doFilters = 0;
-
+  (void)Tcl_RemoveInterpResolvers(interp, "nsf");
+  
 #ifdef DO_CLEANUP
   FreeAllNsfObjectsAndClasses(interp, &instances);
 # ifdef DO_FULL_CLEANUP