diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index 01ab7fb..7dd1980 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -2313,20 +2313,23 @@
     const uint16_t sig_alg)
 {
     switch (sig_alg) {
-#if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED)
-#if defined(PSA_WANT_ALG_SHA_256) && defined(MBEDTLS_ECP_DP_SECP256R1_ENABLED)
+#if defined(MBEDTLS_PK_CAN_ECDSA_SOME)
+#if defined(PSA_WANT_ALG_SHA_256) && \
+    (defined(MBEDTLS_ECP_DP_SECP256R1_ENABLED) || defined(PSA_WANT_ECC_SECP_R1_256))
         case MBEDTLS_TLS1_3_SIG_ECDSA_SECP256R1_SHA256:
             break;
 #endif /* PSA_WANT_ALG_SHA_256 && MBEDTLS_ECP_DP_SECP256R1_ENABLED */
-#if defined(PSA_WANT_ALG_SHA_384) && defined(MBEDTLS_ECP_DP_SECP384R1_ENABLED)
+#if defined(PSA_WANT_ALG_SHA_384) && \
+    (defined(MBEDTLS_ECP_DP_SECP384R1_ENABLED) || defined(PSA_WANT_ECC_SECP_R1_384))
         case MBEDTLS_TLS1_3_SIG_ECDSA_SECP384R1_SHA384:
             break;
 #endif /* PSA_WANT_ALG_SHA_384 && MBEDTLS_ECP_DP_SECP384R1_ENABLED */
-#if defined(PSA_WANT_ALG_SHA_512) && defined(MBEDTLS_ECP_DP_SECP521R1_ENABLED)
+#if defined(PSA_WANT_ALG_SHA_512) && \
+    (defined(MBEDTLS_ECP_DP_SECP521R1_ENABLED) || defined(PSA_WANT_ECC_SECP_R1_521))
         case MBEDTLS_TLS1_3_SIG_ECDSA_SECP521R1_SHA512:
             break;
 #endif /* PSA_WANT_ALG_SHA_512 && MBEDTLS_ECP_DP_SECP521R1_ENABLED */
-#endif /* MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED */
+#endif /* MBEDTLS_PK_CAN_ECDSA_SOME */
 
 #if defined(MBEDTLS_PKCS1_V21)
 #if defined(PSA_WANT_ALG_SHA_256)