diff --git a/src/uikit.cs b/src/uikit.cs
index d406944745..87f67a01b1 100644
--- a/src/uikit.cs
+++ b/src/uikit.cs
@@ -15002,6 +15002,7 @@ namespace UIKit {
 	[iOS (8,0)]
 	[BaseType (typeof (NSObject))]
 	[DesignatedDefaultCtor]
+	[ThreadSafe] // Documentation doesn't say, but it this class doesn't seem to trigger Apple's Main Thread Checker.
 	partial interface UITraitCollection : NSCopying, NSSecureCoding {
 		[Export ("userInterfaceIdiom")]
 		UIUserInterfaceIdiom UserInterfaceIdiom { get; }