@@ -26,10 +26,11 @@
  * @brief A class for representing XML processing instructions.
  */
 @interface OFXMLProcessingInstructions: OFXMLNode
 {
 	OFString *_processingInstructions;
+	OF_RESERVE_IVARS(4)
 }
 
 /*!
  * @brief Creates a new OFXMLProcessingInstructions with the specified string.
  *