Index: generic/nsf.c
===================================================================
diff -u -r57d67eeb3fae34915af0f922161861cc9a5b9afd -r6a0a8ba7bc4de5a2caff9e35ca31d8940312c4ea
--- generic/nsf.c	(.../nsf.c)	(revision 57d67eeb3fae34915af0f922161861cc9a5b9afd)
+++ generic/nsf.c	(.../nsf.c)	(revision 6a0a8ba7bc4de5a2caff9e35ca31d8940312c4ea)
@@ -19406,7 +19406,7 @@
 #ifdef OBJDELETION_TRACE
   fprintf(stderr, "TclDeletesObject %p obj->id %p flags %.6x\n", object, object->id, object->flags);
 #endif
-  if (unlikey((object->flags & NSF_DURING_DELETE) != 0u)
+  if (unlikely((object->flags & NSF_DURING_DELETE) != 0u)
       || (object->teardown == NULL)
       ) {
     return;