diff --git a/lib/base-apis.js b/lib/base-apis.js
index e886ad1ca..ed6ce9188 100644
--- a/lib/base-apis.js
+++ b/lib/base-apis.js
@@ -749,16 +749,23 @@ MatrixBaseApis.prototype.setDeviceDetails = function(device_id, body) {
  * Delete the given device
  *
  * @param {string} device_id  device to delete
+ * @param {object} auth Optional. Auth data to supply for User-Interactive auth.
  * @return {module:client.Promise} Resolves: result object
  * @return {module:http-api.MatrixError} Rejects: with an error response.
  */
-MatrixBaseApis.prototype.deleteDevice = function(device_id) {
+MatrixBaseApis.prototype.deleteDevice = function(device_id, auth) {
     var path = utils.encodeUri("/devices/$device_id", {
         $device_id: device_id,
     });
 
+    var body = {};
+
+    if (auth) {
+        body.auth = auth;
+    }
+
     return this._http.authedRequestWithPrefix(
-        undefined, "DELETE", path, undefined, undefined,
+        undefined, "DELETE", path, undefined, body,
         httpApi.PREFIX_UNSTABLE
     );
 };
diff --git a/spec/integ/matrix-client-methods.spec.js b/spec/integ/matrix-client-methods.spec.js
index f3b941cd6..808304970 100644
--- a/spec/integ/matrix-client-methods.spec.js
+++ b/spec/integ/matrix-client-methods.spec.js
@@ -383,6 +383,23 @@ describe("MatrixClient", function() {
             httpBackend.flush();
         });
     });
+
+    describe("deleteDevice", function() {
+        var auth = {a: 1};
+        it("should pass through an auth dict", function(done) {
+            httpBackend.when(
+                "DELETE", "/_matrix/client/unstable/devices/my_device"
+            ).check(function(req) {
+                expect(req.data).toEqual({auth: auth});
+            }).respond(200);
+
+            client.deleteDevice(
+                "my_device", auth
+            ).catch(utils.failTest).done(done);
+
+            httpBackend.flush();
+        });
+    });
 });
 
 function assertObjectContains(obj, expected) {