diff --git a/library/ssl_srv.c b/library/ssl_srv.c
index 413dfc2d1..3915315f5 100644
--- a/library/ssl_srv.c
+++ b/library/ssl_srv.c
@@ -4151,6 +4151,7 @@ static int ssl_client_key_exchange_parse( mbedtls_ssl_context *ssl,
         if( ( ret = mbedtls_ecdh_read_public( &ssl->handshake->ecdh_ctx,
                                       p, end - p) ) != 0 )
         {
+            ((void) ret);
             MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecdh_read_public", ret );
             return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_RP );
         }