diff --git a/include/enet/enet.h b/include/enet/enet.h
index c7624538..4d3fed2b 100644
--- a/include/enet/enet.h
+++ b/include/enet/enet.h
@@ -393,6 +393,7 @@ typedef struct _ENetHost
    size_t               duplicatePeers;              /**< optional number of allowed peers from duplicate IPs, defaults to ENET_PROTOCOL_MAXIMUM_PEER_ID */
    size_t               maximumPacketSize;           /**< the maximum allowable packet size that may be sent or received on a peer */
    size_t               maximumWaitingData;          /**< the maximum aggregate amount of buffer space a peer may use waiting for packets to be delivered */
+   void *               data;                        /**< Application private data, may be freely modified */
 } ENetHost;
 
 /**