diff --git a/server/controllers/api/claim/publish/validateFileTypeAndSize.js b/server/controllers/api/claim/publish/validateFileTypeAndSize.js
index 095698e7..7f9ddef4 100644
--- a/server/controllers/api/claim/publish/validateFileTypeAndSize.js
+++ b/server/controllers/api/claim/publish/validateFileTypeAndSize.js
@@ -25,7 +25,7 @@ const validateFileTypeAndSize = (file) => {
       break;
     default:
       logger.debug('publish > file validation > unrecognized file type');
-      throw new Error('The ' + file.type + ' content type is not supported.  Only, .jpg, .png, .gif, and .mp4 files are currently supported.');
+      throw new Error('The ' + file.type + ' content type is not supported.  Only, image/jpg, image/png, image/gif, and video/mp4 content types are currently supported.');
   }
   return file;
 };