diff --git a/lib/irc.js b/lib/irc.js
index d6d90c4..8a0eda7 100644
--- a/lib/irc.js
+++ b/lib/irc.js
@@ -285,7 +285,7 @@ function isURIPrefix(text) {
 		}
 	}
 
-	i = text.indexOf("://");
+	let i = text.indexOf("://");
 	if (i <= 0) {
 		return false;
 	}