@@ -26,10 +26,11 @@
 
 /*!
  * @class OFWindowsRegistryKey \
  *	  OFWindowsRegistryKey.h ObjFW/OFWindowsRegistryKey.h
  */
+OF_SUBCLASSING_RESTRICTED
 @interface OFWindowsRegistryKey: OFObject
 {
 	HKEY _hKey;
 	bool _close;
 }