diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index 1da9802..73708bd 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -1620,6 +1620,8 @@
  * saved after the handshake to allow for more efficient serialization, so if
  * you don't need this feature you'll save RAM by disabling it.
  *
+ * Requires: MBEDTLS_GCM_C or MBEDTLS_CCM_C or MBEDTLS_CHACHAPOLY_C
+ *
  * Comment to disable the context serialization APIs.
  */
 #define MBEDTLS_SSL_CONTEXT_SERIALIZATION
@@ -1990,6 +1992,8 @@
  * tickets, including authenticated encryption and key management. Example
  * callbacks are provided by MBEDTLS_SSL_TICKET_C.
  *
+ * Requires: MBEDTLS_GCM_C or MBEDTLS_CCM_C or MBEDTLS_CHACHAPOLY_C
+ *
  * Comment this macro to disable support for SSL session tickets
  */
 #define MBEDTLS_SSL_SESSION_TICKETS