diff --git a/src/main/java/info/textgrid/services/aggregator/html/HTML.java b/src/main/java/info/textgrid/services/aggregator/html/HTML.java
index 18bee4a087caa499617eb7f29038a75a414528d0..72e83648520107eccd2aaa6d60aad99aa7da2594 100644
--- a/src/main/java/info/textgrid/services/aggregator/html/HTML.java
+++ b/src/main/java/info/textgrid/services/aggregator/html/HTML.java
@@ -111,7 +111,7 @@ public StreamingOutput get(@PathParam("object") final URI uri,
 				new XdmAtomicValue(repository.getCRUDRestEndpoint()
 						+ "/@URI@/data"
 						+ ((sid == null || "".equals(sid)) ? ""
-								: ("?sid=" + sid))));
+								: ("?sessionId=" + sid))));
 		if (css != null) {
 			transformer.setParameter(new QName("cssFile"), new XdmAtomicValue(css));
 		}