diff --git a/plugin/src/main/java/de/ids_mannheim/korap/plkexport/IdsExportService.java b/plugin/src/main/java/de/ids_mannheim/korap/plkexport/IdsExportService.java
index bd715e0..61b2800 100644
--- a/plugin/src/main/java/de/ids_mannheim/korap/plkexport/IdsExportService.java
+++ b/plugin/src/main/java/de/ids_mannheim/korap/plkexport/IdsExportService.java
@@ -243,7 +243,6 @@
             LinkedList<MatchExport> listMatches = new LinkedList();
             ObjectMapper objectMapper = new ObjectMapper();
             MatchExport match;
-                        
 
             for (Iterator<JsonNode> itNode = jsonNode1.elements(); itNode
                     .hasNext();) {
@@ -254,6 +253,7 @@
 
             String rtfresp = writeRTF(listMatches);
             builder = Response.ok(rtfresp);
+            builder.type("application/rtf");
             format = "rtf";
         }
 
diff --git a/plugin/src/test/java/de/ids_mannheim/korap/plkexport/IdsExportServiceTest.java b/plugin/src/test/java/de/ids_mannheim/korap/plkexport/IdsExportServiceTest.java
index 0761da7..329461c 100644
--- a/plugin/src/test/java/de/ids_mannheim/korap/plkexport/IdsExportServiceTest.java
+++ b/plugin/src/test/java/de/ids_mannheim/korap/plkexport/IdsExportServiceTest.java
@@ -255,7 +255,7 @@
                 Status.OK.getStatusCode(), responsertf.getStatus());
         // An RTF document should be returned
         assertEquals("Request RTF: Http Content-Type should be: ",
-                MediaType.APPLICATION_OCTET_STREAM,
+                "application/rtf",
                 responsertf.getHeaderString(HttpHeaders.CONTENT_TYPE));
         // Results should not be displayed inline but saved and displayed locally
         assertTrue("Request RTF: Results should not be displayed inline",