Implement RSA-PSK key exchange
diff --git a/include/polarssl/config.h b/include/polarssl/config.h
index dc22c6d..3a173b3 100644
--- a/include/polarssl/config.h
+++ b/include/polarssl/config.h
@@ -307,7 +307,7 @@
  * \def POLARSSL_KEY_EXCHANGE_RSA_PSK_ENABLED
  *
  * Enable the RSA-PSK based ciphersuite modes in SSL / TLS.
- * (NOT YET IMPLEMENTED)
+ *
  * Requires: POLARSSL_RSA_C, POLARSSL_PKCS1_V15,
  *           POLARSSL_X509_CRT_PARSE_C
  *
@@ -321,8 +321,8 @@
  *      TLS_RSA_PSK_WITH_AES_256_CBC_SHA384
  *      TLS_RSA_PSK_WITH_AES_128_GCM_SHA256
  *      TLS_RSA_PSK_WITH_AES_256_GCM_SHA384
-#define POLARSSL_KEY_EXCHANGE_RSA_PSK_ENABLED
  */
+#define POLARSSL_KEY_EXCHANGE_RSA_PSK_ENABLED
 
 /**
  * \def POLARSSL_KEY_EXCHANGE_RSA_ENABLED