@@ -52,10 +52,12 @@
  * @param data The data for the extension
  * @return A new, autoreleased OFMessagePackRepresentation
  */
 + (instancetype)extensionWithType: (int8_t)type
 			     data: (OFDataArray *)data;
+
+- init OF_UNAVAILABLE;
 
 /*!
  * @brief Initializes an already allocated OFMessagePackRepresentation with the
  *	  specified type and data.
  *