diff --git a/lib/tls/mbedtls/mbedtls-ssl.c b/lib/tls/mbedtls/mbedtls-ssl.c
index d5f06d53a..c764f3da4 100644
--- a/lib/tls/mbedtls/mbedtls-ssl.c
+++ b/lib/tls/mbedtls/mbedtls-ssl.c
@@ -306,7 +306,7 @@ __lws_tls_shutdown(struct lws *wsi)
 
 	switch (n) {
 	case 1: /* successful completion */
-		n = shutdown(wsi->desc.sockfd, SHUT_WR);
+		(void)shutdown(wsi->desc.sockfd, SHUT_WR);
 		return LWS_SSL_CAPABLE_DONE;
 
 	case 0: /* needs a retry */