diff --git a/lualib/http/internal.lua b/lualib/http/internal.lua
index a34b7df6..a2ed2247 100644
--- a/lualib/http/internal.lua
+++ b/lualib/http/internal.lua
@@ -185,7 +185,12 @@ function M.request(interface, method, host, url, recvheader, header, content)
 	end
 
 	if content then
-		local data = string.format("%s %s HTTP/1.1\r\n%sContent-length:%d\r\n\r\n", method, url, header_content, #content)
+		local data
+		if header["transfer-encoding"] == "chunked" then
+			data = string.format("%s %s HTTP/1.1\r\n%s\r\n", method, url, header_content)
+		else
+			data = string.format("%s %s HTTP/1.1\r\n%sContent-length:%d\r\n\r\n", method, url, header_content, #content)
+		end
 		write(data)
 		write(content)
 	else