diff --git a/examples/client.c b/examples/client.c
index 615bcb77..7fbdf3f6 100644
--- a/examples/client.c
+++ b/examples/client.c
@@ -562,7 +562,11 @@ static void fetch_uri(const struct URI *uri) {
     diec("nghttp2_session_client_new", rv);
   }
 
-  nghttp2_submit_settings(connection.session, NGHTTP2_FLAG_NONE, NULL, 0);
+  rv = nghttp2_submit_settings(connection.session, NGHTTP2_FLAG_NONE, NULL, 0);
+
+  if (rv != 0) {
+    diec("nghttp2_submit_settings", rv);
+  }
 
   /* Submit the HTTP request to the outbound queue. */
   submit_request(&connection, &req);