diff --git a/lib/roles/http/client/client.c b/lib/roles/http/client/client.c
index f4a4d5bdc..d39f8f430 100644
--- a/lib/roles/http/client/client.c
+++ b/lib/roles/http/client/client.c
@@ -1164,7 +1164,8 @@ lws_http_client_read(struct lws *wsi, char **buf, int *len)
 	// lwsl_notice("%s: rlen %d\n", __func__, rlen);
 
 	/* allow the source to signal he has data again next time */
-	lws_change_pollfd(wsi, 0, LWS_POLLIN);
+	if (lws_change_pollfd(wsi, 0, LWS_POLLIN))
+		return -1;
 
 	if (rlen == LWS_SSL_CAPABLE_ERROR) {
 		lwsl_debug("%s: SSL capable error\n", __func__);