diff --git a/apps/lib/s_cb.c b/apps/lib/s_cb.c
index 496cb3c6f1..b567b179b6 100644
--- a/apps/lib/s_cb.c
+++ b/apps/lib/s_cb.c
@@ -894,7 +894,8 @@ int generate_stateless_cookie_callback(SSL *ssl, unsigned char *cookie,
     buffer = app_malloc(length, "cookie generate buffer");
 
     memcpy(buffer, &port, sizeof(port));
-    BIO_ADDR_rawaddress(peer, buffer + sizeof(port), NULL);
+    if (!BIO_ADDR_rawaddress(peer, buffer + sizeof(port), NULL))
+        goto end;
 
     if (EVP_Q_mac(NULL, "HMAC", NULL, "SHA1", NULL,
                   cookie_secret, COOKIE_SECRET_LENGTH, buffer, length,