@@ -13,10 +13,12 @@
  * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
  * file.
  */
 
 #import "OFMapTable.h"
+
+OF_ASSUME_NONNULL_BEGIN
 
 @interface OFMapTable_EnumeratorWrapper: OFEnumerator
 {
 	OFMapTableEnumerator *_enumerator;
 	id _object;
@@ -23,5 +25,7 @@
 }
 
 - initWithEnumerator: (OFMapTableEnumerator*)enumerator
 	      object: (id)object;
 @end
+
+OF_ASSUME_NONNULL_END