diff --git a/modules/ixBidAdapter.js b/modules/ixBidAdapter.js
index f3ac8185f17..89506a5659b 100644
--- a/modules/ixBidAdapter.js
+++ b/modules/ixBidAdapter.js
@@ -153,7 +153,7 @@ export const spec = {
       return false;
     }
 
-    if (typeof bid.params.siteId !== 'string') {
+    if (typeof bid.params.siteId !== 'string' && typeof bid.params.siteId !== 'number') {
       return false;
     }
 
diff --git a/test/spec/modules/ixBidAdapter_spec.js b/test/spec/modules/ixBidAdapter_spec.js
index 92a7190bcb6..36b2b0e9629 100644
--- a/test/spec/modules/ixBidAdapter_spec.js
+++ b/test/spec/modules/ixBidAdapter_spec.js
@@ -77,10 +77,10 @@ describe('IndexexchangeAdapter', () => {
       expect(spec.isBidRequestValid(bid)).to.equal(true);
     });
 
-    it('should return false when siteID is number', () => {
+    it('should return true when siteID is number', () => {
       const bid = utils.deepClone(DEFAULT_BANNER_VALID_BID[0]);
       bid.params.siteId = 123;
-      expect(spec.isBidRequestValid(bid)).to.equal(false);
+      expect(spec.isBidRequestValid(bid)).to.equal(true);
     });
 
     it('should return false when siteID is missing', () => {