diff --git a/scripts/singleuse.pl b/scripts/singleuse.pl
index fdf4857215..3ed171a3e7 100755
--- a/scripts/singleuse.pl
+++ b/scripts/singleuse.pl
@@ -150,6 +150,11 @@ my %api = (
     'curl_url_strerror' => 'API',
     'curl_version' => 'API',
     'curl_version_info' => 'API',
+    'curl_easy_header' => 'API',
+    'curl_easy_nextheader' => 'API',
+    'curl_ws_meta' => 'API',
+    'curl_ws_recv' => 'API',
+    'curl_ws_send' => 'API',
 
     # the following functions are provided globally in debug builds
     'curl_easy_perform_ev' => 'debug-build',