diff --git a/src/appkit.cs b/src/appkit.cs
index 57ebff6752c6..448fa0a74f55 100644
--- a/src/appkit.cs
+++ b/src/appkit.cs
@@ -15866,6 +15866,7 @@ partial interface NSView : NSDraggingDestination, NSAnimatablePropertyContainer,
 		[Export ("performMnemonic:")]
 		bool PerformMnemonic (string mnemonic);
 
+		[NullAllowed]
 		[Export ("nextKeyView")]
 		NSView NextKeyView { get; set; }