diff --git a/js/viewer/viewer.js b/js/viewer/viewer.js
index 590801fe..88363694 100644
--- a/js/viewer/viewer.js
+++ b/js/viewer/viewer.js
@@ -12,6 +12,9 @@ var odfViewer = {
 		'application/vnd.wordperfect',
 		'application/msonenote',
 		'application/msword',
+		'application/rtf',
+		'text/rtf',
+		'text/plain',
 		'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
 		'application/vnd.openxmlformats-officedocument.wordprocessingml.template',
 		'application/vnd.ms-word.document.macroEnabled.12',
@@ -244,4 +247,4 @@ $(document).ready(function() {
 			$('#content').removeClass('loading');
 		}
 	}, false);
-});
\ No newline at end of file
+});