diff --git a/modules/openxBidAdapter.js b/modules/openxBidAdapter.js
index ba2f7c5a45f..3d2b652d403 100644
--- a/modules/openxBidAdapter.js
+++ b/modules/openxBidAdapter.js
@@ -336,8 +336,10 @@ function buildOXBannerRequest(bids, bidderRequest) {
   let customFloorsForAllBids = [];
   let hasCustomFloor = false;
   bids.forEach(function (bid) {
-    if (bid.params.customFloor) {
-      customFloorsForAllBids.push((Math.round(bid.params.customFloor * 100) / 100) * 1000);
+    let floor = getBidFloor(bid, BANNER);
+
+    if (floor) {
+      customFloorsForAllBids.push(floor);
       hasCustomFloor = true;
     } else {
       customFloorsForAllBids.push(0);
@@ -453,4 +455,18 @@ function createVideoBidResponses(response, {bid, startTime}) {
   return bidResponses;
 }
 
+function getBidFloor(bidRequest, mediaType) {
+  let floorInfo = {};
+  if (typeof bidRequest.getFloor === 'function') {
+    floorInfo = bidRequest.getFloor({
+      currency: 'USD',
+      mediaType: mediaType,
+      size: '*'
+    });
+  }
+  let floor = floorInfo.floor || bidRequest.params.customFloor || 0;
+
+  return Math.round(floor * 1000); // normalize to microCpm
+}
+
 registerBidder(spec);
diff --git a/test/spec/modules/openxBidAdapter_spec.js b/test/spec/modules/openxBidAdapter_spec.js
index ad110bcfb53..7fc490a3838 100644
--- a/test/spec/modules/openxBidAdapter_spec.js
+++ b/test/spec/modules/openxBidAdapter_spec.js
@@ -540,25 +540,6 @@ describe('OpenxAdapter', function () {
       expect(dataParams.tps).to.equal(btoa('test1=testval1.&test2=testval2_,testval3'));
     });
 
-    it('should send out custom floors on bids that have customFloors specified', function () {
-      const bidRequest = Object.assign({},
-        bidRequestsWithMediaTypes[0],
-        {
-          params: {
-            'unit': '12345678',
-            'delDomain': 'test-del-domain',
-            'customFloor': 1.500001
-          }
-        }
-      );
-
-      const request = spec.buildRequests([bidRequest], mockBidderRequest);
-      const dataParams = request[0].data;
-
-      expect(dataParams.aumfs).to.exist;
-      expect(dataParams.aumfs).to.equal('1500');
-    });
-
     it('should send out custom bc parameter, if override is present', function () {
       const bidRequest = Object.assign({},
         bidRequestsWithMediaTypes[0],
@@ -1121,6 +1102,59 @@ describe('OpenxAdapter', function () {
         });
       });
     });
+
+    context('floors', function () {
+      it('should send out custom floors on bids that have customFloors specified', function () {
+        const bidRequest = Object.assign({},
+          bidRequestsWithMediaTypes[0],
+          {
+            params: {
+              'unit': '12345678',
+              'delDomain': 'test-del-domain',
+              'customFloor': 1.500001
+            }
+          }
+        );
+
+        const request = spec.buildRequests([bidRequest], mockBidderRequest);
+        const dataParams = request[0].data;
+
+        expect(dataParams.aumfs).to.exist;
+        expect(dataParams.aumfs).to.equal('1500');
+      });
+
+      it('should send out floors on bids when there', function () {
+        const bidRequest1 = Object.assign({},
+          bidRequestsWithMediaTypes[0],
+          {
+            getFloor: () => {
+              return {
+                currency: 'AUS',
+                floor: 9.99
+              }
+            }
+          }
+        );
+
+        const bidRequest2 = Object.assign({},
+          bidRequestsWithMediaTypes[1],
+          {
+            getFloor: () => {
+              return {
+                currency: 'AUS',
+                floor: 18.881
+              }
+            }
+          }
+        );
+
+        const request = spec.buildRequests([bidRequest1, bidRequest2], mockBidderRequest);
+        const dataParams = request[0].data;
+
+        expect(dataParams.aumfs).to.exist;
+        expect(dataParams.aumfs).to.equal('9990,18881');
+      });
+    })
   });
 
   describe('buildRequests for video', function () {