Index: generic/nsf.c
===================================================================
diff -u -r4511d3209c8aa380f08fa1919f65ca147b30c249 -rd2e248fb4ae598c85082be386cd7d6c917fde2aa
--- generic/nsf.c	(.../nsf.c)	(revision 4511d3209c8aa380f08fa1919f65ca147b30c249)
+++ generic/nsf.c	(.../nsf.c)	(revision d2e248fb4ae598c85082be386cd7d6c917fde2aa)
@@ -16857,7 +16857,7 @@
      * parameter definition.
      */
     result = ProcessMethodArguments(pcPtr, interp, NULL,
-                                    (((tcd->flags & NSF_PROC_FLAG_CHECK_ALWAYS) != 0) ? NSF_ARGPARSE_CHECK : 0)
+                                    (((tcd->flags & NSF_PROC_FLAG_CHECK_ALWAYS) != 0u) ? NSF_ARGPARSE_CHECK : 0u)
                                     |NSF_ARGPARSE_FORCE_REQUIRED,
                                     tcd->paramDefs, objv[0],
                                     objc, objv);