diff --git a/scripts/singleuse.pl b/scripts/singleuse.pl
index b6ec18b47f..0251594b12 100755
--- a/scripts/singleuse.pl
+++ b/scripts/singleuse.pl
@@ -49,6 +49,9 @@ my %wl = (
     'Curl_creader_def_total_length' => 'internal api',
     'Curl_meta_reset' => 'internal api',
     'Curl_trc_dns' => 'internal api',
+    'curlx_base64_decode' => 'internal api',
+    'curlx_base64_encode' => 'internal api',
+    'curlx_base64url_encode' => 'internal api',
 );
 
 my %api = (