Index: generic/nsfStack.c
===================================================================
diff -u -N -rfa5f13036107660d1f326275773e36962704599e -r5b6d88f867023b304dd16a7d23895d5c80ae606e
--- generic/nsfStack.c	(.../nsfStack.c)	(revision fa5f13036107660d1f326275773e36962704599e)
+++ generic/nsfStack.c	(.../nsfStack.c)	(revision 5b6d88f867023b304dd16a7d23895d5c80ae606e)
@@ -112,8 +112,6 @@
  *
  *----------------------------------------------------------------------
  */
-void NsfShowStack(Tcl_Interp *interp) nonnull(1);
-
 void NsfShowStack(Tcl_Interp *interp) {
   Tcl_CallFrame *framePtr;