diff --git a/runtime/doc/vim2html.pl b/runtime/doc/vim2html.pl
index d51f607..9066b03 100644
--- a/runtime/doc/vim2html.pl
+++ b/runtime/doc/vim2html.pl
@@ -214,7 +214,7 @@
 }
 
 # main
-usage() if $#ARGV < 2;
+usage() if $#ARGV < 1;
 
 print "Processing tags...\n";
 readTagFile( $ARGV[ 0 ] );