diff --git a/README b/README
index 1685d35..621a423 100644
--- a/README
+++ b/README
@@ -38,7 +38,7 @@ OPTIONS
               defines the modifier for the key. Available modifiers are: ctrl,shift,mod1 (usually the alt-key),mod2,mod3,mod4 (usually windows key). This option can be used  multiple  times  to
               combine modifiers.
 
-       -mon n
+       -mon n show the notification on monitor n.
 
        -mon [[<width>]x<height>][+/-<X>+/-<y>]
               The geometry of the message window. The height is measured in lines everything else in pixels. If the width is omitted but the height is given ("-geometry x2"), the message window
diff --git a/dunst.1 b/dunst.1
index 4b23be0..5c097bd 100644
--- a/dunst.1
+++ b/dunst.1
@@ -50,6 +50,7 @@ close window by pressing key [a,b,space,Return etc.] (should be used in combinat
 defines the modifier for the key. Available modifiers are: ctrl,shift,mod1 (usually the alt-key),mod2,mod3,mod4 (usually windows key). This option can be used multiple times to combine modifiers.
 .TP
 .BI \-mon " n"
+show the notification on monitor n.
 .TP
 .BI \-mon " [[<width>]x<height>][+/-<X>+/-<y>]"
 The geometry of the message window. The height is measured in lines everything else in pixels. If the width is omitted but the height is given ("-geometry x2"), the message window expands over the whole screen (dmenu-like). If width is 0, the window expands to the longest message displayed. A positive x is measured from the left, a negative from the right side of the screen. Y is measured from the top and down respectevly. see also EXAMPLES