diff --git a/src/messageui.cs b/src/messageui.cs
index adf00e9680dd..9b391d206f78 100644
--- a/src/messageui.cs
+++ b/src/messageui.cs
@@ -46,6 +46,10 @@ interface MFMailComposeViewController : UIAppearance {
 
 		[Export ("addAttachmentData:mimeType:fileName:")]
 		void AddAttachmentData (NSData attachment, string mimeType, string fileName);
+
+		[iOS (11,0)]
+		[Export ("setPreferredSendingEmailAddress:")]
+		void SetPreferredSendingEmailAddress (string emailAddress);
 	}
 
 #if XAMCORE_3_0