diff --git a/modules/rubiconBidAdapter.js b/modules/rubiconBidAdapter.js
index d502d7efb25..eeac484ef9e 100644
--- a/modules/rubiconBidAdapter.js
+++ b/modules/rubiconBidAdapter.js
@@ -946,7 +946,11 @@ function appendSiteAppDevice(data, bidRequest, bidderRequest) {
   if (bidRequest.params.video.language) {
     ['site', 'device'].forEach(function(param) {
       if (data[param]) {
-        data[param].content = Object.assign({language: bidRequest.params.video.language}, data[param].content)
+        if (param === 'site') {
+          data[param].content = Object.assign({language: bidRequest.params.video.language}, data[param].content)
+        } else {
+          data[param] = Object.assign({language: bidRequest.params.video.language}, data[param])
+        }
       }
     });
   }