diff --git a/index.html b/index.html
index 12b4264..f24e005 100644
--- a/index.html
+++ b/index.html
@@ -605,9 +605,9 @@ <h3 id="devicemotion"><span class=secno>4.4 </span>devicemotion Event</h3>
     };
 
     dictionary DeviceMotionEventInit : EventInit {
-      DeviceAccelerationInit? acceleration;
-      DeviceAccelerationInit? accelerationIncludingGravity;
-      DeviceRotationRateInit? rotationRate;
+      DeviceAccelerationInit acceleration;
+      DeviceAccelerationInit accelerationIncludingGravity;
+      DeviceRotationRateInit rotationRate;
       double interval = 0;
     };
   </pre>