@@ -20,13 +20,17 @@
 # import <ObjFW/OFDictionary.h>
 #endif
 
 #import "OFBridging.h"
 
+OF_ASSUME_NONNULL_BEGIN
+
 /*!
  * @category OFDictionary (NSObject) \
  *	     OFDictionary+NSObject.h ObjFW-Bridge/OFDictionary+NSObject.h
  *
  * @brief Support for bridging OFDictionaries to NSDictionaries.
  */
 @interface OFDictionary (NSObject) <OFBridging>
 @end
+
+OF_ASSUME_NONNULL_END