Index: generic/xotclInt.h
===================================================================
diff -u -N -rf3cb5afe6aa1b6761b4a9909058f64ff7d64ab92 -r3cb6a6a8f1e33e63abeec25b3c36231702af6fe2
--- generic/xotclInt.h	(.../xotclInt.h)	(revision f3cb5afe6aa1b6761b4a9909058f64ff7d64ab92)
+++ generic/xotclInt.h	(.../xotclInt.h)	(revision 3cb6a6a8f1e33e63abeec25b3c36231702af6fe2)
@@ -366,8 +366,9 @@
 #define XOTCL_ARG_NOARG 		     0x0004
 #define XOTCL_ARG_CURRENTLY_UNKNOWN	     0x0008
 #define XOTCL_ARG_SUBST_DEFAULT		     0x0010
-#define XOTCL_ARG_INITCMD		     0x0020
-#define XOTCL_ARG_METHOD		     0x0040
+#define XOTCL_ARG_ALLOW_EMPTY		     0x0020
+#define XOTCL_ARG_INITCMD		     0x0040
+#define XOTCL_ARG_METHOD		     0x0080
 #define XOTCL_ARG_RELATION		     0x0100
 #define XOTCL_ARG_SWITCH		     0x0200
 #define XOTCL_ARG_HAS_DEFAULT		     0x1000