diff --git a/index.js b/index.js
index 9a62283..89c0cef 100644
--- a/index.js
+++ b/index.js
@@ -167,6 +167,9 @@ var handlers = {
 function makeSay(body) {
     var whom = hookToChannel[body.object_kind] || [];
     return function say(msgs) {
+        if (!whom.length) {
+            return;
+        }
         if (msgs) {
             if (msgs instanceof Array) {
                 for (var i = 0; i < msgs.length; i++)