diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index bf8a9e2b4..540f5527c 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -961,7 +961,6 @@ struct mbedtls_ssl_session
 typedef enum
 {
    MBEDTLS_SSL_TLS_PRF_NONE,
-   MBEDTLS_SSL_TLS_PRF_TLS1,
    MBEDTLS_SSL_TLS_PRF_SHA384,
    MBEDTLS_SSL_TLS_PRF_SHA256,
    MBEDTLS_SSL_HKDF_EXPAND_SHA384,