diff --git a/MoltenVK/MoltenVK/GPUObjects/MVKSwapchain.mm b/MoltenVK/MoltenVK/GPUObjects/MVKSwapchain.mm
index 2e888f7f..31bd8fae 100644
--- a/MoltenVK/MoltenVK/GPUObjects/MVKSwapchain.mm
+++ b/MoltenVK/MoltenVK/GPUObjects/MVKSwapchain.mm
@@ -384,7 +384,12 @@ void MVKSwapchain::initSurfaceImages(const VkSwapchainCreateInfoKHR* pCreateInfo
 
 VkResult MVKSwapchain::getRefreshCycleDuration(VkRefreshCycleDurationGOOGLE *pRefreshCycleDuration) {
 #if MVK_IOS
-	NSInteger framesPerSecond = [UIScreen mainScreen].maximumFramesPerSecond;
+	NSInteger framesPerSecond = 60;
+	if (@available(iOS 10.3, *)) {
+		framesPerSecond = [UIScreen mainScreen].maximumFramesPerSecond;
+	} else {
+		// TODO: fallback
+	}
 #endif
 #if MVK_MACOS
 	// TODO: hook this up for macOS, probably need to use CGDisplayModeGetRefeshRate