diff --git a/library/ssl_tls12_client.c b/library/ssl_tls12_client.c
index 76588d3..7c54820 100644
--- a/library/ssl_tls12_client.c
+++ b/library/ssl_tls12_client.c
@@ -1870,7 +1870,7 @@
 MBEDTLS_CHECK_RETURN_CRITICAL
 static int ssl_check_server_ecdh_params( const mbedtls_ssl_context *ssl )
 {
-    const mbedtls_ecp_curve_info *curve_info;
+    uint16_t tls_id;
     mbedtls_ecp_group_id grp_id;
 #if defined(MBEDTLS_ECDH_LEGACY_CONTEXT)
     grp_id = ssl->handshake->ecdh_ctx.grp.id;
@@ -1878,14 +1878,15 @@
     grp_id = ssl->handshake->ecdh_ctx.grp_id;
 #endif
 
-    curve_info = mbedtls_ecp_curve_info_from_grp_id( grp_id );
-    if( curve_info == NULL )
+    tls_id = mbedtls_ssl_get_tls_id_from_ecp_group_id( grp_id );
+    if( tls_id == 0 )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
         return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
     }
 
-    MBEDTLS_SSL_DEBUG_MSG( 2, ( "ECDH curve: %s", curve_info->name ) );
+    MBEDTLS_SSL_DEBUG_MSG( 2, ( "ECDH curve: %s",
+                mbedtls_ssl_get_curve_name_from_tls_id( tls_id ) ) );
 
     if( mbedtls_ssl_check_curve( ssl, grp_id ) != 0 )
         return( -1 );
@@ -2346,16 +2347,16 @@
          * that TLS ID here
          */
         uint16_t read_tls_id = MBEDTLS_GET_UINT16_BE( p, 1 );
-        const mbedtls_ecp_curve_info *curve_info;
+        uint16_t exp_tls_id = mbedtls_ssl_get_tls_id_from_ecp_group_id(
+                                    MBEDTLS_ECP_DP_SECP256R1 );
 
-        if( ( curve_info = mbedtls_ecp_curve_info_from_grp_id(
-                                MBEDTLS_ECP_DP_SECP256R1 ) ) == NULL )
+        if( exp_tls_id == 0 )
         {
             return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
         }
 
         if( ( *p != MBEDTLS_ECP_TLS_NAMED_CURVE ) ||
-            ( read_tls_id != curve_info->tls_id ) )
+            ( read_tls_id != exp_tls_id ) )
         {
             return( MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER );
         }