diff --git a/lib/irc.js b/lib/irc.js
index 23ccfe08..2a390a3f 100644
--- a/lib/irc.js
+++ b/lib/irc.js
@@ -316,7 +316,7 @@ function Client(server, nick, opt) {
                         self.emit(eventName, message.args[0], message.nick, mode, modeArg, message);
                     } else if (supported.a.indexOf(mode) !== -1) {
                         modeArg = modeArgs.shift();
-                        chanModes(mode, [modeArg]);
+                        chanModes(mode, modeArg);
                         self.emit(eventName, message.args[0], message.nick, mode, modeArg, message);
                     } else if (supported.b.indexOf(mode) !== -1) {
                         modeArg = modeArgs.shift();