diff --git a/hsarback/src/de/hsadmin/pillar/JsonPillarServlet.java b/hsarback/src/de/hsadmin/pillar/JsonPillarServlet.java
index 2bb2c3c..98fbb56 100644
--- a/hsarback/src/de/hsadmin/pillar/JsonPillarServlet.java
+++ b/hsarback/src/de/hsadmin/pillar/JsonPillarServlet.java
@@ -121,7 +121,10 @@ public class JsonPillarServlet extends HttpServlet {
 				} else {
 					writer.println("        , {");
 				}
-				writer.println("          \"user\": \"" + user.getName() + "\"");
+				final String fullUsername = user.getName();
+				final String usernamePostfix = fullUsername.length() > 6 ? fullUsername.substring(6) : "_";
+				writer.println("          \"user\": \"" + fullUsername + "\"");
+				writer.println("          \"dirname\": \"" + usernamePostfix + "\"");
 				writer.println("          , \"uid\": " + user.getUserId());
 				writer.println("          , \"comment\": \"" + user.getComment() + "\"");
 				writer.println("          , \"shell\": \"" + user.getShell() + "\"");