diff --git a/docs/examples/cookie_interface.c b/docs/examples/cookie_interface.c
index b9278dbcda2da4948604097515a1e6dc0c826089..d184edb54e427bc2fedd3bf6677e164df04d172e 100644
--- a/docs/examples/cookie_interface.c
+++ b/docs/examples/cookie_interface.c
@@ -64,7 +64,7 @@ main(void)
     print_cookies(curl);
 
     printf("Erasing curl's knowledge of cookies!\n");
-    curl_easy_setopt(curl, CURLOPT_COOKIELIST, NULL);
+    curl_easy_setopt(curl, CURLOPT_COOKIELIST, "ALL");
 
     print_cookies(curl);