@@ -13,13 +13,17 @@
  * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
  * file.
  */
 
 #import "OFZIPArchive.h"
+
+OF_ASSUME_NONNULL_BEGIN
 
 @interface OFZIPArchiveEntry (OF_PRIVATE_CATEGORY)
 - (instancetype)OF_initWithStream: (OFStream*)stream;
 - (uint16_t)OF_generalPurposeBitFlag;
 - (uint16_t)OF_lastModifiedFileTime;
 - (uint16_t)OF_lastModifiedFileDate;
 - (uint64_t)OF_localFileHeaderOffset;
 @end
+
+OF_ASSUME_NONNULL_END