diff --git a/gentong.js b/gentong.js
index 220c79c..0327035 100644
--- a/gentong.js
+++ b/gentong.js
@@ -159,7 +159,7 @@ function parseSN(message, _config) {
 
     var match_index = 0;
     if (_config.h2h_out.sn_match_index) {
-        match_index = Number(_config.h2h_out.sn_match_index)
+        match_index = Number(_config.h2h_out.sn_match_index);
     }
 
     var sn = sn_match[match_index];