diff --git a/resources/install/scripts/app/voicemail/resources/functions/send_email.lua b/resources/install/scripts/app/voicemail/resources/functions/send_email.lua
index 5d3bba5b34..7409d1040a 100644
--- a/resources/install/scripts/app/voicemail/resources/functions/send_email.lua
+++ b/resources/install/scripts/app/voicemail/resources/functions/send_email.lua
@@ -104,7 +104,7 @@
 					subject = subject:gsub("${account}", id);
 					subject = subject:gsub("${domain_name}", domain_name);
 					subject = trim(subject);
-					subject = '=?utf-8?B?'..base64.enc(subject)..'?=';
+					subject = '=?utf-8?B?'..base64.encode(subject)..'?=';
 
 				--prepare the body
 					local f = io.open(file_body, "r");