diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index e2fb9b6..4843e42 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -6277,6 +6277,41 @@
     MBEDTLS_MD_SHA384,
     MBEDTLS_MD_NONE
 };
+
+#if defined(MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL)
+static uint16_t ssl_preset_default_sig_algs[] = {
+    /* ECDSA algorithms */
+#if defined(MBEDTLS_ECDSA_C)
+#if defined(MBEDTLS_SHA256_C) && defined(MBEDTLS_ECP_DP_SECP256R1_ENABLED)
+    MBEDTLS_TLS13_SIG_ECDSA_SECP256R1_SHA256,
+#endif /* MBEDTLS_SHA256_C && MBEDTLS_ECP_DP_SECP256R1_ENABLED */
+#if defined(MBEDTLS_SHA512_C) && defined(MBEDTLS_ECP_DP_SECP384R1_ENABLED)
+    MBEDTLS_TLS13_SIG_ECDSA_SECP384R1_SHA384,
+#endif /* MBEDTLS_SHA512_C && MBEDTLS_ECP_DP_SECP384R1_ENABLED */
+#if defined(MBEDTLS_SHA512_C) && defined(MBEDTLS_ECP_DP_SECP521R1_ENABLED)
+    MBEDTLS_TLS13_SIG_ECDSA_SECP521R1_SHA512,
+#endif /* MBEDTLS_SHA512_C && MBEDTLS_ECP_DP_SECP521R1_ENABLED */
+#endif /* MBEDTLS_ECDSA_C */
+    /* RSA algorithms */
+#if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT)
+    MBEDTLS_TLS13_SIG_RSA_PSS_RSAE_SHA256,
+#endif
+    MBEDTLS_TLS13_SIG_NONE
+};
+
+static uint16_t ssl_preset_suiteb_sig_algs[] = {
+    /* ECDSA algorithms */
+#if defined(MBEDTLS_ECDSA_C)
+#if defined(MBEDTLS_SHA256_C) && defined(MBEDTLS_ECP_DP_SECP256R1_ENABLED)
+    MBEDTLS_TLS13_SIG_ECDSA_SECP256R1_SHA256,
+#endif /* MBEDTLS_SHA256_C && MBEDTLS_ECP_DP_SECP256R1_ENABLED */
+#if defined(MBEDTLS_SHA512_C) && defined(MBEDTLS_ECP_DP_SECP384R1_ENABLED)
+    MBEDTLS_TLS13_SIG_ECDSA_SECP384R1_SHA384,
+#endif /* MBEDTLS_SHA512_C && MBEDTLS_ECP_DP_SECP384R1_ENABLED */
+#endif /* MBEDTLS_ECDSA_C */
+    MBEDTLS_TLS13_SIG_NONE
+};
+#endif /* MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL */
 #endif
 
 #if defined(MBEDTLS_ECP_C)
@@ -6391,6 +6426,9 @@
 
 #if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
             conf->sig_hashes = ssl_preset_suiteb_hashes;
+#if defined(MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL)
+            conf->tls13_sig_algs = ssl_preset_suiteb_sig_algs;
+#endif /* MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL */
 #endif
 
 #if defined(MBEDTLS_ECP_C)
@@ -6427,6 +6465,10 @@
             conf->sig_hashes = ssl_preset_default_hashes;
 #endif
 
+#if defined(MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL)
+            conf->tls13_sig_algs = ssl_preset_default_sig_algs;
+#endif /* MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL */
+
 #if defined(MBEDTLS_ECP_C)
             conf->curve_list = ssl_preset_default_curves;
 #endif