diff --git a/asyncoperations.lua b/asyncoperations.lua
index bd0c652..a3536f0 100644
--- a/asyncoperations.lua
+++ b/asyncoperations.lua
@@ -1,12 +1,16 @@
 local table = table
 local assert = assert
+local select = select
 
 module "irc"
 
 local meta = _META
 
-function meta:send(fmt, ...)
-	local bytes, err = self.socket:send(fmt:format(...) .. "\r\n")
+function meta:send(msg, ...)
+	if select("#", ...) > 0 then
+		msg = msg:format(...)
+	end
+	local bytes, err = self.socket:send(msg .. "\r\n")
 
 	if not bytes and err ~= "timeout" and err ~= "wantwrite" then
 		self:invoke("OnDisconnect", err, true)
diff --git a/doc/irc.luadoc b/doc/irc.luadoc
index ff5bbee..70b4206 100644
--- a/doc/irc.luadoc
+++ b/doc/irc.luadoc
@@ -71,9 +71,9 @@ function irc:whois(nick)
 function irc:topic(channel)
 
 --- Send a raw line of IRC to the server.
--- @param fmt Line to be sent, excluding newline characters.
--- @param ... Format parameters for <code>fmt</code>, with <code>string.format</code> semantics.
-function irc:send(fmt, ...)
+-- @param msg Line to be sent, excluding newline characters.
+-- @param ... Format parameters for <code>msg</code>, with <code>string.format</code> semantics. [optional]
+function irc:send(msg, ...)
 
 --- Send a message to a channel or user.
 -- @param target Nick or channel to send to.
diff --git a/init.lua b/init.lua
index 6571740..4f0f0da 100644
--- a/init.lua
+++ b/init.lua
@@ -26,7 +26,7 @@ function meta_preconnect.__index(o, k)
 	local v = rawget(meta_preconnect, k)
 
 	if not v and meta[k] then
-		error("field '"..k.."' is not accessible before connecting", 2)
+		error(("field '%s' is not accessible before connecting"):format(k), 2)
 	end
 	return v
 end