apps/nshlib/nsh_parse.c:  Fix a warning (really a bug) detected in build testing.
@@ -1269,7 +1269,7 @@ static FAR char *nsh_argexpand(FAR struct nsh_vtbl_s *vtbl, FAR char *cmdline,
else
#endif
-#ifdef CONFIG_NSH_VARS
+#ifdef NSH_HAVE_VARS
/* Check if we encountered a reference to an environment variable */
if (*ptr == '$')
