diff --git a/nselib/http.lua b/nselib/http.lua
index 5d4261f97..1d9dd4953 100644
--- a/nselib/http.lua
+++ b/nselib/http.lua
@@ -1361,7 +1361,7 @@ local MONTH_MAP = {
 -- * Sun, 06 Nov 1994 08:49:37 GMT  (RFC 822, updated by RFC 1123)
 -- * Sunday, 06-Nov-94 08:49:37 GMT (RFC 850, obsoleted by RFC 1036)
 -- * Sun Nov  6 08:49:37 1994       (ANSI C's <code>asctime()</code> format)
--- @arg s the date string.
+-- @param s the date string.
 -- @return a table with keys <code>year</code>, <code>month</code>,
 -- <code>day</code>, <code>hour</code>, <code>min</code>, <code>sec</code>, and
 -- <code>isdst</code>, relative to GMT, suitable for input to