diff --git a/dunstrc b/dunstrc
index a954e40..dbe7eab 100644
--- a/dunstrc
+++ b/dunstrc
@@ -141,6 +141,7 @@
     word_wrap = yes
 
     # When word_wrap is set to no, specify where to ellipsize long lines.
+    # Possible values are "start", "middle" and "end".
     ellipsize = middle
 
     # Ignore newlines '\n' in notifications.