diff --git a/i3lock.1 b/i3lock.1
index 05a886f..07f1270 100644
--- a/i3lock.1
+++ b/i3lock.1
@@ -123,6 +123,7 @@ Show the number of failed attempts, if any.
 .TP
 .B \-\-debug
 Enables debug logging.
+Note, that this will log the password used for authentication to stdout.
 
 .SH SEE ALSO
 .IR xautolock(1)