diff --git a/modules/yieldmoBidAdapter.js b/modules/yieldmoBidAdapter.js
index ad2aff7dec84..b747e40becd2 100644
--- a/modules/yieldmoBidAdapter.js
+++ b/modules/yieldmoBidAdapter.js
@@ -111,7 +111,7 @@ function createNewBid(response) {
     cpm: response.cpm,
     width: response.width,
     height: response.height,
-    creativeId: response.creativeId,
+    creativeId: response.creative_id,
     currency: CURRENCY,
     netRevenue: NET_REVENUE,
     ttl: TIME_TO_LIVE,
diff --git a/test/spec/modules/yieldmoBidAdapter_spec.js b/test/spec/modules/yieldmoBidAdapter_spec.js
index 462b2715d24f..45baecf96177 100644
--- a/test/spec/modules/yieldmoBidAdapter_spec.js
+++ b/test/spec/modules/yieldmoBidAdapter_spec.js
@@ -104,7 +104,7 @@ describe('YieldmoAdapter', function () {
           width: 300,
           height: 250,
           ad: '<html><head></head><body><script>//GEX ad object</script><div id=\"ym_123\" class=\"ym\"></div><script>//js code</script></body></html>',
-          creativeId: '9874652394875'
+          creative_id: '9874652394875'
         }],
         header: 'header?'
       };
