diff --git a/src/adapters/smartadserver.js b/src/adapters/smartadserver.js
index c0c80dbbe3b..f35923411bb 100644
--- a/src/adapters/smartadserver.js
+++ b/src/adapters/smartadserver.js
@@ -14,6 +14,7 @@ var SmartAdServer = function SmartAdServer() {
         bidObject = bidfactory.createBid(1);
         bidObject.bidderCode = 'smartadserver';
         bidObject.cpm = adUnit.cpm;
+        bidObject.currency = adUnit.currency;
         bidObject.ad = adUnit.ad;
         bidObject.width = adUnit.width;
         bidObject.height = adUnit.height;
@@ -40,6 +41,7 @@ var SmartAdServer = function SmartAdServer() {
           "siteid": bid.params.siteId,
           "pgid": bid.params.pageId,
           "fmtid": bid.params.formatId,
+          "ccy": bid.params.currency || "USD",
           "tgt": encodeURIComponent(bid.params.target || ''),
           "tag": bid.placementCode,
           "sizes": bid.sizes.map(size => size[0] + "x" + size[1]).join(","),
diff --git a/test/spec/adapters/smartadserver_spec.js b/test/spec/adapters/smartadserver_spec.js
index d5989d679b1..f48f10d9cb5 100644
--- a/test/spec/adapters/smartadserver_spec.js
+++ b/test/spec/adapters/smartadserver_spec.js
@@ -18,7 +18,8 @@ describe("smartadserver adapter tests", function () {
               siteId: "1234",
               pageId: "5678",
               formatId: "90",
-              target: "test=prebid"
+              target: "test=prebid",
+              currency: "EUR"
             },
             requestId: "efgh5678",
             placementCode: "sas_42"
@@ -26,6 +27,24 @@ describe("smartadserver adapter tests", function () {
       ]
   };
 
+  var DEFAULT_PARAMS_WO_OPTIONAL = {
+    bidderCode: "smartadserver",
+    bids: [{
+      bidId: "abcd1234",
+        sizes: [[300, 250], [300, 200]],
+          bidder: "smartadserver",
+          params: {
+            domain: "http://www.smartadserver.com",
+            siteId: "1234",
+            pageId: "5678",
+            formatId: "90"
+          },
+          requestId: "efgh5678",
+          placementCode: "sas_42"
+      }
+    ]
+  };
+
   var BID_RESPONSE = {
     cpm: 0.42,
     ad: "fake ad content",
@@ -58,6 +77,7 @@ describe("smartadserver adapter tests", function () {
     expect(parsedBidUrlQueryString).to.have.property("pgid").and.to.equal("5678");
     expect(parsedBidUrlQueryString).to.have.property("fmtid").and.to.equal("90");
     expect(parsedBidUrlQueryString).to.have.property("tgt").and.to.equal("test=prebid");
+    expect(parsedBidUrlQueryString).to.have.property("ccy").and.to.equal("EUR");
     expect(parsedBidUrlQueryString).to.have.property("tag").and.to.equal("sas_42");
     expect(parsedBidUrlQueryString).to.have.property("sizes").and.to.equal("300x250,300x200");
     expect(parsedBidUrlQueryString).to.have.property("async").and.to.equal("1");
@@ -65,6 +85,21 @@ describe("smartadserver adapter tests", function () {
     stubLoadScript.restore();
   });
 
+  it("test optional parameters default value", function () {
+    var stubLoadScript = sinon.stub(adLoader, "loadScript");
+
+    adapter().callBids(DEFAULT_PARAMS_WO_OPTIONAL);
+
+    var bidUrl = stubLoadScript.getCall(0).args[0];
+    var parsedBidUrl = urlParse(bidUrl);
+    var parsedBidUrlQueryString = querystringify.parse(parsedBidUrl.query);
+
+    expect(parsedBidUrlQueryString).to.have.property("tgt").and.to.equal("");
+    expect(parsedBidUrlQueryString).to.have.property("ccy").and.to.equal("USD");
+
+    stubLoadScript.restore();
+  });
+
   it("creates an empty bid response if no bids", function() {
     var stubLoadScript = sinon.stub(adLoader, "loadScript", function(url) {
       var bidUrl = stubLoadScript.getCall(0).args[0];