diff --git a/doc/w3m.1 b/doc/w3m.1
index 0781bb9..81ace72 100644
--- a/doc/w3m.1
+++ b/doc/w3m.1
@@ -77,7 +77,8 @@ visual startup mode
 monochrome display
 .TP
 .B -N
-open URL of command line on each new tab
+distribute multiple command line arguments to tabs. By default, a
+stack of buffers is used
 .TP
 .B -F
 automatically render frame