diff --git a/core/droidkaigiui/src/iosMain/kotlin/io/github/droidkaigi/confsched/droidkaigiui/OrientationSensorManager.ios.kt b/core/droidkaigiui/src/iosMain/kotlin/io/github/droidkaigi/confsched/droidkaigiui/OrientationSensorManager.ios.kt
index 3e81b37db..55614fdbc 100644
--- a/core/droidkaigiui/src/iosMain/kotlin/io/github/droidkaigi/confsched/droidkaigiui/OrientationSensorManager.ios.kt
+++ b/core/droidkaigiui/src/iosMain/kotlin/io/github/droidkaigi/confsched/droidkaigiui/OrientationSensorManager.ios.kt
@@ -22,12 +22,12 @@ internal class IosOrientationSensorManager(
     private val motionManager = CMMotionManager()
 
     override fun start() {
-        if (!motionManager.deviceMotionActive) {
+        if (!motionManager.deviceMotionAvailable) {
             return
         }
-        NSOperationQueue.currentQueue()?.let {
+        NSOperationQueue.mainQueue().let { queue ->
             motionManager.startDeviceMotionUpdatesToQueue(
-                it,
+                queue,
             ) { motion, _ ->
                 if (motion == null) {
                     return@startDeviceMotionUpdatesToQueue