diff --git a/app/darwin_armx.go b/app/darwin_armx.go
index 3639c7d..5a4f6d8 100644
--- a/app/darwin_armx.go
+++ b/app/darwin_armx.go
@@ -13,6 +13,7 @@ package app
 #include <sys/utsname.h>
 #include <stdint.h>
 #include <pthread.h>
+#include <UIKit/UIDevice.h>
 
 extern struct utsname sysInfo;
 
@@ -97,15 +98,23 @@ func setScreen(scale int) {
 }
 
 //export updateConfig
-func updateConfig(width, height int) {
-	widthPx := screenScale * width
-	heightPx := screenScale * height
+func updateConfig(width, height, orientation int32) {
+	o := config.OrientationUnknown
+	switch orientation {
+	case C.UIDeviceOrientationPortrait, C.UIDeviceOrientationPortraitUpsideDown:
+		o = config.OrientationPortrait
+	case C.UIDeviceOrientationLandscapeLeft, C.UIDeviceOrientationLandscapeRight:
+		o = config.OrientationLandscape
+	}
+	widthPx := screenScale * int(width)
+	heightPx := screenScale * int(height)
 	eventsIn <- config.Event{
 		WidthPx:     widthPx,
 		HeightPx:    heightPx,
 		WidthPt:     geom.Pt(float32(widthPx) / pixelsPerPt),
 		HeightPt:    geom.Pt(float32(heightPx) / pixelsPerPt),
 		PixelsPerPt: pixelsPerPt,
+		Orientation: o,
 	}
 }
 
diff --git a/app/darwin_armx.m b/app/darwin_armx.m
index c8ea451..c521bba 100644
--- a/app/darwin_armx.m
+++ b/app/darwin_armx.m
@@ -54,11 +54,17 @@ struct utsname sysInfo;
 	setScreen(scale);
 
 	CGSize size = [UIScreen mainScreen].bounds.size;
-	updateConfig((int)size.width, (int)size.height);
+	UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
+	updateConfig((int)size.width, (int)size.height, orientation);
 }
 
 - (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator {
-	updateConfig((int)size.width, (int)size.height);
+	[coordinator animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext> context) {
+	      // TODO(crawshaw): come up with a plan to handle animations.
+	} completion:^(id<UIViewControllerTransitionCoordinatorContext> context) {
+		UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
+		updateConfig((int)size.width, (int)size.height, orientation);
+	}];
 }
 
 - (void)update {