diff --git a/push-down-test/functions.txt b/push-down-test/functions.txt
index 3b1da69..57ea864 100644
--- a/push-down-test/functions.txt
+++ b/push-down-test/functions.txt
@@ -107,3 +107,4 @@ inet6_ntoa
 uncompressed_length
 md5
 sha1
+to_base64
\ No newline at end of file