diff --git a/hsarback/src/de/hsadmin/core/model/AnnFieldIO.java b/hsarback/src/de/hsadmin/core/model/AnnFieldIO.java
index c1ceef7..3e534d6 100644
--- a/hsarback/src/de/hsadmin/core/model/AnnFieldIO.java
+++ b/hsarback/src/de/hsadmin/core/model/AnnFieldIO.java
@@ -10,5 +10,6 @@ import java.lang.annotation.Target;
 public @interface AnnFieldIO {
 	String validation() default "[A-Za-z0-9\\_\\-]*";
 	ReadWriteAccess rw() default ReadWriteAccess.WRITEONCE;
-	Class<?> referTo() default Object.class;
+	Class<?> referTo() default Void.class;
+	String[] referredProps() default { };
 }