diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index 87012da..dbb84b4 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -2649,6 +2649,7 @@
  *           MBEDTLS_SSL_CONF_SINGLE_EC
  *           MBEDTLS_SSL_CONF_SINGLE_EC_TLS_ID == 23
  *           MBEDTLS_SSL_CONF_SINGLE_UECC_GRP_ID == MBEDTLS_UECC_DP_SECP256R1
+ *           MBEDTLS_SHA256_C
  *
  * \see MBEDTLS_SSL_CONF_RNG
  *