diff --git a/hsarback/src/de/hsadmin/mods/user/UnixUser.java b/hsarback/src/de/hsadmin/mods/user/UnixUser.java
index a74f5d2..a23b060 100644
--- a/hsarback/src/de/hsadmin/mods/user/UnixUser.java
+++ b/hsarback/src/de/hsadmin/mods/user/UnixUser.java
@@ -57,7 +57,7 @@ public class UnixUser extends AbstractEntity implements Serializable {
 	@Column(name = "comment", columnDefinition = "character varying(128)")
 	private String comment;
 
-	@AnnFieldIO(validation="[a-z\\/]*", rw=ReadWriteAccess.READWRITE)
+	@AnnFieldIO(validation="[-0-9A-Za-z\\/]*", rw=ReadWriteAccess.READWRITE)
 	@Column(name = "shell", columnDefinition = "character varying(32)")
 	private String shell;