diff --git a/winixd/utils/http.cpp b/winixd/utils/http.cpp
index 407fb7e..3faf641 100644
--- a/winixd/utils/http.cpp
+++ b/winixd/utils/http.cpp
@@ -477,12 +477,8 @@ bool Http::fetch_internal(const char * url, const std::string * in, pt::TextStre
 		curl_easy_setopt(curl, CURLOPT_SEEKDATA,		this);
 		curl_easy_setopt(curl, CURLOPT_POST,			1);
 
-		/*
-		 * do not set content-leght header here
-		 * curl uses "Expect: 100-continue" and it collides if Content-Length is set
-		 * https://daniel.haxx.se/blog/2020/02/27/expect-tweaks-in-curl/
-		 *
-		 */
+		curl_off_t size = read_function_input->size();
+		curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE_LARGE, size);
 	}
 
 	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION,	fetch_write_function);