Index: src/bridge/NSArray+OFObject.h
==================================================================
--- src/bridge/NSArray+OFObject.h
+++ src/bridge/NSArray+OFObject.h
@@ -19,10 +19,12 @@
 
 #import "NSBridging.h"
 
 OF_ASSUME_NONNULL_BEGIN
 
+@class OFArray OF_GENERIC(ObjectType);
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 extern int _NSArray_OFObject_reference;
 #ifdef __cplusplus
@@ -34,8 +36,9 @@
  *	     NSArray+OFObject.h ObjFW-Bridge/NSArray+OFObject.h
  *
  * @brief Support for bridging NSArrays to OFArrays.
  */
 @interface NSArray (OFObject) <NSBridging>
+@property (readonly, nonatomic) OFArray *OFObject;
 @end
 
 OF_ASSUME_NONNULL_END

Index: src/bridge/NSDictionary+OFObject.h
==================================================================
--- src/bridge/NSDictionary+OFObject.h
+++ src/bridge/NSDictionary+OFObject.h
@@ -19,10 +19,12 @@
 
 #import "NSBridging.h"
 
 OF_ASSUME_NONNULL_BEGIN
 
+@class OFDictionary OF_GENERIC(KeyType, ObjectType);
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 extern int _NSDictionary_OFObject_reference;
 #ifdef __cplusplus
@@ -34,8 +36,9 @@
  *	     NSDictionary+OFObject.h ObjFW-Bridge/NSDictionary+OFObject.h
  *
  * @brief Support for bridging NSDictionaries to OFDictionaries.
  */
 @interface NSDictionary (OFObject) <NSBridging>
+@property (readonly, nonatomic) OFDictionary *OFObject;
 @end
 
 OF_ASSUME_NONNULL_END

Index: src/bridge/NSString+OFObject.h
==================================================================
--- src/bridge/NSString+OFObject.h
+++ src/bridge/NSString+OFObject.h
@@ -18,10 +18,12 @@
 #import <Foundation/NSString.h>
 
 #import "NSBridging.h"
 
 OF_ASSUME_NONNULL_BEGIN
+
+@class OFString;
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 extern int _NSString_OFObject_reference;
@@ -38,8 +40,9 @@
  * Unfortunately, they need to be copied, as NSString is not capable of
  * handling UCS-4 properly (a character of NSString is only 2 bytes, while a
  * character of OFString is 4).
  */
 @interface NSString (OFObject) <NSBridging>
+@property (readonly, nonatomic) OFString *OFObject;
 @end
 
 OF_ASSUME_NONNULL_END

Index: src/bridge/OFArray+NSObject.h
==================================================================
--- src/bridge/OFArray+NSObject.h
+++ src/bridge/OFArray+NSObject.h
@@ -41,8 +41,9 @@
  * @category OFArray (NSObject) \
  *	     OFArray+NSObject.h ObjFW-Bridge/OFArray+NSObject.h
  * @brief Support for bridging OFArrays to NSArrays.
  */
 @interface OFArray (NSObject) <OFBridging>
+@property (readonly, nonatomic) NSArray *NSObject;
 @end
 
 OF_ASSUME_NONNULL_END

Index: src/bridge/OFDictionary+NSObject.h
==================================================================
--- src/bridge/OFDictionary+NSObject.h
+++ src/bridge/OFDictionary+NSObject.h
@@ -42,8 +42,9 @@
  *	     OFDictionary+NSObject.h ObjFW-Bridge/OFDictionary+NSObject.h
  *
  * @brief Support for bridging OFDictionaries to NSDictionaries.
  */
 @interface OFDictionary (NSObject) <OFBridging>
+@property (readonly, nonatomic) NSDictionary *NSObject;
 @end
 
 OF_ASSUME_NONNULL_END

Index: src/bridge/OFString+NSObject.h
==================================================================
--- src/bridge/OFString+NSObject.h
+++ src/bridge/OFString+NSObject.h
@@ -46,8 +46,9 @@
  * Unfortunately, they need to be copied, as NSString is not capable of
  * handling UCS-4 properly (a character of NSString is only 2 bytes, while a
  * character of OFString is 4).
  */
 @interface OFString (NSObject) <OFBridging>
+@property (readonly, nonatomic) NSString *NSObject;
 @end
 
 OF_ASSUME_NONNULL_END