@@ -32,10 +32,11 @@
 	OFWindowsRegistryKey *_registryKey;
 	OFString *_Nullable _valueName;
 	OFData *_Nullable _data;
 	DWORD _type;
 	LSTATUS _status;
+	OF_RESERVE_IVARS(OFSetWindowsRegistryValueFailedException, 4)
 }
 
 /**
  * @brief The registry key on which setting the value failed.
  */