diff --git a/include/polarssl/config.h b/include/polarssl/config.h
index abca55f..b13a407 100644
--- a/include/polarssl/config.h
+++ b/include/polarssl/config.h
@@ -2201,6 +2201,7 @@
 //#define SSL_MAX_CONTENT_LEN             16384 /**< Size of the input / output buffer */
 //#define SSL_DEFAULT_TICKET_LIFETIME     86400 /**< Lifetime of session tickets (if enabled) */
 //#define POLARSSL_PSK_MAX_LEN               32 /**< Max size of TLS pre-shared keys, in bytes (default 256 bits) */
+//#define POLARSSL_SSL_COOKIE_TIMEOUT        60 /**< Default expiration delay of DTLS cookies, in seconds if HAVE_TIME, or in number of cookies issued */
 
 /**
  * Complete list of ciphersuites to use, in order of preference.