@@ -16,13 +16,17 @@
 
 #import <Foundation/NSDictionary.h>
 
 #import "NSBridging.h"
 
+OF_ASSUME_NONNULL_BEGIN
+
 /*!
  * @category NSDictionary (OFObject) \
  *	     NSDictionary+OFObject.h ObjFW-Bridge/NSDictionary+OFObject.h
  *
  * @brief Support for bridging NSDictionaries to OFDictionaries.
  */
 @interface NSDictionary (OFObject) <NSBridging>
 @end
+
+OF_ASSUME_NONNULL_END