diff --git a/lib/irc.js b/lib/irc.js
index fd4650a..0a3daf8 100644
--- a/lib/irc.js
+++ b/lib/irc.js
@@ -245,7 +245,8 @@ export function isHighlight(msg, nick) {
 	if (msg.command != "PRIVMSG" && msg.command != "NOTICE") {
 		return false;
 	}
-	if (msg.prefix.name == nick) {
+	// TODO: case-mapping handling
+	if (msg.prefix && msg.prefix.name == nick) {
 		return false; // Our own messages aren't highlights
 	}