diff --git a/lib/client.js b/lib/client.js
index 2974854..a5ec935 100644
--- a/lib/client.js
+++ b/lib/client.js
@@ -477,10 +477,16 @@ export default class Client extends EventTarget {
 	}
 
 	isMyNick(nick) {
+		if (!nick) {
+			return false;
+		}
 		return this.cm(nick) == this.cm(this.nick);
 	}
 
 	isChannel(name) {
+		if (!name) {
+			return false;
+		}
 		var chanTypes = this.isupport.get("CHANTYPES") || irc.STD_CHANTYPES;
 		return chanTypes.indexOf(name[0]) >= 0;
 	}