diff --git a/AsyncDisplayKit/Details/ASPINRemoteImageDownloader.h b/AsyncDisplayKit/Details/ASPINRemoteImageDownloader.h
index b76b298173..a1238272ed 100644
--- a/AsyncDisplayKit/Details/ASPINRemoteImageDownloader.h
+++ b/AsyncDisplayKit/Details/ASPINRemoteImageDownloader.h
@@ -9,8 +9,12 @@
 #import <Foundation/Foundation.h>
 #import "ASImageProtocols.h"
 
+NS_ASSUME_NONNULL_BEGIN
+
 @interface ASPINRemoteImageDownloader : NSObject <ASImageCacheProtocol, ASImageDownloaderProtocol>
 
 + (ASPINRemoteImageDownloader *)sharedDownloader;
 
 @end
+
+NS_ASSUME_NONNULL_END