Index: generic/nsf.c
===================================================================
diff -u -rdaa771f51afaa25dcdc99d371c313099cb1516e4 -r0c9b20f1cb06b0507ef76608bba64c6ca5a3710b
--- generic/nsf.c	(.../nsf.c)	(revision daa771f51afaa25dcdc99d371c313099cb1516e4)
+++ generic/nsf.c	(.../nsf.c)	(revision 0c9b20f1cb06b0507ef76608bba64c6ca5a3710b)
@@ -21654,7 +21654,7 @@
    */
   if ((unlikely((doCheckArguments & NSF_ARGPARSE_CHECK) == 0u) && (pPtr->flags & (NSF_ARG_IS_CONVERTER)) == 0u) ||
       ((pPtr->flags & (NSF_ARG_CMD)) != 0u) ||
-      ((pPtr->flags & NSF_ARG_SLOTSET) != 0u)) {
+      ((pPtr->flags & (NSF_ARG_SLOTSET)) != 0u)) {
     /* fprintf(stderr, "*** omit  argument check for arg %s flags %.6x\n", pPtr->name, pPtr->flags); */
     *clientData = ObjStr(objPtr);
     return TCL_OK;