diff --git a/Natives/ViewController.m b/Natives/ViewController.m
index 1f1c2549..e9a87f28 100644
--- a/Natives/ViewController.m
+++ b/Natives/ViewController.m
@@ -54,7 +54,7 @@
 - (void)glkView:(GLKView *)view drawInRect:(CGRect)rect
 {
     glClear(GL_COLOR_BUFFER_BIT);
-    callback_AppDelegate_didFinishLaunching(rect.width, rect.height);
+    callback_AppDelegate_didFinishLaunching(rect.size.width, rect.size.height);
 }
 
 @end