diff --git a/modules/appnexusAstBidAdapter.js b/modules/appnexusAstBidAdapter.js
index 5e7ee0e0609..94a028f9868 100644
--- a/modules/appnexusAstBidAdapter.js
+++ b/modules/appnexusAstBidAdapter.js
@@ -211,8 +211,16 @@ function newBid(serverBid, rtbBid) {
       body: nativeAd.desc,
       cta: nativeAd.ctatext,
       sponsoredBy: nativeAd.sponsored,
-      image: nativeAd.main_img && nativeAd.main_img.url,
-      icon: nativeAd.icon && nativeAd.icon.url,
+      image: {
+        url: nativeAd.main_img && nativeAd.main_img.url,
+        height: nativeAd.main_img && nativeAd.main_img.height,
+        width: nativeAd.main_img && nativeAd.main_img.width,
+      },
+      icon: {
+        url: nativeAd.icon && nativeAd.icon.url,
+        height: nativeAd.icon && nativeAd.icon.height,
+        width: nativeAd.icon && nativeAd.icon.width,
+      },
       clickUrl: nativeAd.link.url,
       clickTrackers: nativeAd.link.click_trackers,
       impressionTrackers: nativeAd.impression_trackers,
diff --git a/src/native.js b/src/native.js
index c992cf9ad61..9c591aa539c 100644
--- a/src/native.js
+++ b/src/native.js
@@ -146,7 +146,13 @@ export function getNativeTargeting(bid) {
 
   Object.keys(bid['native']).forEach(asset => {
     const key = NATIVE_KEYS[asset];
-    const value = bid['native'][asset];
+    let value = bid['native'][asset];
+
+    // native image-type assets can be a string or an object with a url prop
+    if (typeof value === 'object' && value.url) {
+      value = value.url;
+    }
+
     if (key) {
       keyValues[key] = value;
     }
diff --git a/test/spec/modules/appnexusAstBidAdapter_spec.js b/test/spec/modules/appnexusAstBidAdapter_spec.js
index bfd15710db4..660ecfc507a 100644
--- a/test/spec/modules/appnexusAstBidAdapter_spec.js
+++ b/test/spec/modules/appnexusAstBidAdapter_spec.js
@@ -422,7 +422,7 @@ describe('AppNexusAdapter', () => {
       expect(result[0].native.title).to.equal('Native Creative');
       expect(result[0].native.body).to.equal('Cool description great stuff');
       expect(result[0].native.cta).to.equal('Do it');
-      expect(result[0].native.image).to.equal('http://cdn.adnxs.com/img.png');
+      expect(result[0].native.image.url).to.equal('http://cdn.adnxs.com/img.png');
     });
   });
 });