diff --git a/common.go b/common.go
index 78c762f..beca798 100644
--- a/common.go
+++ b/common.go
@@ -215,6 +215,25 @@ type ClientSessionCache interface {
 	Put(sessionKey string, cs *ClientSessionState)
 }
 
+// SignatureScheme identifies a signature algorithm supported by TLS. See
+// https://tools.ietf.org/html/draft-ietf-tls-tls13-18#section-4.2.3.
+type SignatureScheme uint16
+
+const (
+	PKCS1WithSHA1   SignatureScheme = 0x0201
+	PKCS1WithSHA256 SignatureScheme = 0x0401
+	PKCS1WithSHA384 SignatureScheme = 0x0501
+	PKCS1WithSHA512 SignatureScheme = 0x0601
+
+	PSSWithSHA256 SignatureScheme = 0x0804
+	PSSWithSHA384 SignatureScheme = 0x0805
+	PSSWithSHA512 SignatureScheme = 0x0806
+
+	ECDSAWithP256AndSHA256 SignatureScheme = 0x0403
+	ECDSAWithP384AndSHA384 SignatureScheme = 0x0503
+	ECDSAWithP521AndSHA512 SignatureScheme = 0x0603
+)
+
 // ClientHelloInfo contains information from a ClientHello message in order to
 // guide certificate selection in the GetCertificate callback.
 type ClientHelloInfo struct {
@@ -244,7 +263,7 @@ type ClientHelloInfo struct {
 	// is willing to verify. SignatureSchemes is set only if the Signature
 	// Algorithms Extension is being used (see
 	// https://tools.ietf.org/html/rfc5246#section-7.4.1.4.1).
-	SignatureSchemes []uint16
+	SignatureSchemes []SignatureScheme
 
 	// SupportedProtos lists the application protocols supported by the client.
 	// SupportedProtos is set only if the Application-Layer Protocol
diff --git a/handshake_server.go b/handshake_server.go
index 0cccd65..b786c30 100644
--- a/handshake_server.go
+++ b/handshake_server.go
@@ -822,9 +822,9 @@ func (hs *serverHandshakeState) clientHelloInfo() *ClientHelloInfo {
 		supportedVersions = suppVersArray[VersionTLS12-hs.clientHello.vers:]
 	}
 
-	signatureSchemes := make([]uint16, 0, len(hs.clientHello.signatureAndHashes))
+	signatureSchemes := make([]SignatureScheme, 0, len(hs.clientHello.signatureAndHashes))
 	for _, sah := range hs.clientHello.signatureAndHashes {
-		signatureSchemes = append(signatureSchemes, uint16(sah.hash)<<8+uint16(sah.signature))
+		signatureSchemes = append(signatureSchemes, SignatureScheme(sah.hash)<<8+SignatureScheme(sah.signature))
 	}
 
 	hs.cachedClientHelloInfo = &ClientHelloInfo{