diff --git a/lualib/http/internal.lua b/lualib/http/internal.lua
index 8c26519a..5b008920 100644
--- a/lualib/http/internal.lua
+++ b/lualib/http/internal.lua
@@ -160,11 +160,11 @@ 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 = string.format("%s %s HTTP/1.1\r\n%sContent-length:%d\r\n\r\n", method, url, header_content, #content)
 		write(data)
 		write(content)
 	else
-		local request_header = string.format("%s %s HTTP/1.1\r\n%scontent-length:0\r\n\r\n", method, url, header_content)
+		local request_header = string.format("%s %s HTTP/1.1\r\n%sContent-length:0\r\n\r\n", method, url, header_content)
 		write(request_header)
 	end