diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index 0610ac0..b144a42 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -2164,7 +2164,6 @@
 #if defined(MBEDTLS_SSL_PROTO_TLS1_3)
 
 static inline int mbedtls_ssl_tls13_check_sig_alg_cert_key_match(
-                mbedtls_ssl_context *ssl,
                 uint16_t sig_alg,
                 mbedtls_pk_context *key)
 {
diff --git a/library/ssl_tls13_generic.c b/library/ssl_tls13_generic.c
index a488faf..f0b84de 100644
--- a/library/ssl_tls13_generic.c
+++ b/library/ssl_tls13_generic.c
@@ -873,7 +873,7 @@
         }
         if( mbedtls_ssl_sig_alg_is_supported( ssl, *sig_alg) &&
             mbedtls_ssl_tls13_check_sig_alg_cert_key_match(
-                                              ssl, *sig_alg, own_key ) )
+                                                        *sig_alg, own_key ) )
         {
             *algorithm = *sig_alg;
             return( 0 );
diff --git a/library/ssl_tls13_server.c b/library/ssl_tls13_server.c
index a9ef6b4..2e7f1d8 100644
--- a/library/ssl_tls13_server.c
+++ b/library/ssl_tls13_server.c
@@ -390,7 +390,7 @@
             }
 
             if( mbedtls_ssl_tls13_check_sig_alg_cert_key_match(
-                    ssl, *sig_alg, &key_cert->cert->pk ) )
+                                            *sig_alg, &key_cert->cert->pk ) )
             {
                 ssl->handshake->key_cert = key_cert;
                 MBEDTLS_SSL_DEBUG_CRT(