diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index 221cee3..3090f93 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -338,6 +338,41 @@
 #define MBEDTLS_SSL_SIG_ECDSA                3
 
 /*
+ * TLS 1.3 signature algorithms
+ * RFC 8446, Section 4.2.2
+ */
+
+/* RSASSA-PKCS1-v1_5 algorithms */
+#define MBEDTLS_TLS13_SIG_RSA_PKCS1_SHA256 0x0401
+#define MBEDTLS_TLS13_SIG_RSA_PKCS1_SHA384 0x0501
+#define MBEDTLS_TLS13_SIG_RSA_PKCS1_SHA512 0x0601
+
+/* ECDSA algorithms */
+#define MBEDTLS_TLS13_SIG_ECDSA_SECP256R1_SHA256 0x0403
+#define MBEDTLS_TLS13_SIG_ECDSA_SECP384R1_SHA384 0x0503
+#define MBEDTLS_TLS13_SIG_ECDSA_SECP521R1_SHA512 0x0603
+
+/* RSASSA-PSS algorithms with public key OID rsaEncryption */
+#define MBEDTLS_TLS13_SIG_RSA_PSS_RSAE_SHA256 0x0804
+#define MBEDTLS_TLS13_SIG_RSA_PSS_RSAE_SHA384 0x0805
+#define MBEDTLS_TLS13_SIG_RSA_PSS_RSAE_SHA512 0x0806
+
+/* EdDSA algorithms */
+#define MBEDTLS_TLS13_SIG_ED25519 0x0807
+#define MBEDTLS_TLS13_SIG_ED448 0x0808
+
+/* RSASSA-PSS algorithms with public key OID RSASSA-PSS  */
+#define MBEDTLS_TLS13_SIG_RSA_PSS_PSS_SHA256 0x0809
+#define MBEDTLS_TLS13_SIG_RSA_PSS_PSS_SHA384 0x080A
+#define MBEDTLS_TLS13_SIG_RSA_PSS_PSS_SHA512 0x080B
+
+/* LEGACY ALGORITHMS */
+#define MBEDTLS_TLS13_SIG_RSA_PKCS1_SHA1 0x0201
+#define MBEDTLS_TLS13_SIG_ECDSA_SHA1     0x0203
+
+#define MBEDTLS_TLS13_SIG_NONE 0x0
+
+/*
  * Client Certificate Types
  * RFC 5246 section 7.4.4 plus RFC 4492 section 5.5
  */