diff -r e4d31cd0e6d8 -r ed66dc50f31a lib/iec_types_all.h
--- a/lib/iec_types_all.h	Sun Dec 13 11:41:22 2009 +0100
+++ b/lib/iec_types_all.h	Tue Dec 15 08:51:44 2009 +0100
@@ -79,9 +79,11 @@
 /* Enumerate native types */
 #define __decl_enum_type(TYPENAME) TYPENAME##_ENUM,
 #define __decl_enum_pointer(TYPENAME) TYPENAME##_P_ENUM,
+#define __decl_enum_output(TYPENAME) TYPENAME##_O_ENUM,
 typedef enum{
   ANY(__decl_enum_type)
   ANY(__decl_enum_pointer)
+  ANY(__decl_enum_output)
   /* SFC specific types are never external or global */
   UNKNOWN_ENUM
 } __IEC_types_enum;