diff --git a/modules/yahoosspBidAdapter.js b/modules/yahoosspBidAdapter.js
index 71b1ddca2c4..51d9bd30b84 100644
--- a/modules/yahoosspBidAdapter.js
+++ b/modules/yahoosspBidAdapter.js
@@ -237,7 +237,9 @@ function generateOpenRtbObject(bidderRequest, bid) {
       device: {
         dnt: 0,
         ua: navigator.userAgent,
-        ip: deepAccess(bid, 'params.bidOverride.device.ip') || deepAccess(bid, 'params.ext.ip') || undefined
+        ip: deepAccess(bid, 'params.bidOverride.device.ip') || deepAccess(bid, 'params.ext.ip') || undefined,
+        w: window.screen.width,
+        h: window.screen.height
       },
       regs: {
         ext: {
diff --git a/test/spec/modules/yahoosspBidAdapter_spec.js b/test/spec/modules/yahoosspBidAdapter_spec.js
index 6e52e9c57db..e0b6390832b 100644
--- a/test/spec/modules/yahoosspBidAdapter_spec.js
+++ b/test/spec/modules/yahoosspBidAdapter_spec.js
@@ -847,7 +847,9 @@ describe('YahooSSP Bid Adapter:', () => {
       expect(data.device).to.deep.equal({
         dnt: 0,
         ua: navigator.userAgent,
-        ip: undefined
+        ip: undefined,
+        w: window.screen.width,
+        h: window.screen.height
       });
 
       expect(data.regs).to.deep.equal({