diff --git a/BeefLibs/curl/src/Curl.bf b/BeefLibs/curl/src/Curl.bf
index fb42d006..9cbd9f70 100644
--- a/BeefLibs/curl/src/Curl.bf
+++ b/BeefLibs/curl/src/Curl.bf
@@ -860,6 +860,8 @@ namespace CURL
 			HTTP2Stream,            /* 92 - stream error in HTTP/2 framing layer */
 		}
 
+		public struct SList;
+
 		[CLink, CallingConvention(.Stdcall)]
 		static extern void* curl_easy_init();
 
@@ -881,6 +883,12 @@ namespace CURL
 		[CLink, CallingConvention(.Stdcall)]
 		static extern void* curl_easy_reset(void* curl);
 
+		[CLink, CallingConvention(.Stdcall)]
+		static extern SList* curl_slist_append(SList* list, char8* val);
+
+		[CLink, CallingConvention(.Stdcall)]
+		static extern void curl_slist_free_all(SList* list);
+
 		void* mCURL;
 
 		public this()
@@ -941,6 +949,12 @@ namespace CURL
 			return WrapResult((ReturnCode)curl_easy_setopt(mCURL, (int)option, (int)funcPtr));
 		}
 
+		public Result<void, ReturnCode> SetOpt(Option option, SList* list)
+		{
+			Debug.Assert(((int)option / 10000 == 1));
+			return WrapResult((ReturnCode)curl_easy_setopt(mCURL, (int)option, (int)(void*)list));
+		}
+
 		public Result<void> GetInfo(CurlInfo info, String val)
 		{
 			char8* ptr = null;
@@ -960,5 +974,15 @@ namespace CURL
 		{
 			curl_easy_reset(mCURL);
 		}
+
+		public SList* Add(SList* list, StringView val)
+		{
+			return curl_slist_append(list, val.ToScopeCStr!());
+		}
+
+		public void Free(SList* list)
+		{
+			curl_slist_free_all(list);
+		}
 	}
 }
\ No newline at end of file
diff --git a/BeefLibs/curl/src/Transfer.bf b/BeefLibs/curl/src/Transfer.bf
index 9460161c..eb9d37c9 100644
--- a/BeefLibs/curl/src/Transfer.bf
+++ b/BeefLibs/curl/src/Transfer.bf
@@ -9,6 +9,7 @@ namespace CURL
 	class Transfer
 	{
 		CURL.Easy mCurl;
+		CURL.Easy.SList* mHeaderList;
 		bool mOwns;
 		bool mCancelling = false;
 		List<uint8> mData = new List<uint8>() ~ delete _;
@@ -77,6 +78,9 @@ namespace CURL
 
 			if (mOwns)
 				delete mCurl;
+
+			if (mHeaderList != null)
+				mCurl.Free(mHeaderList);
 		}
 
 		int GetCurBytesPerSecond()
@@ -146,6 +150,11 @@ namespace CURL
 			mCurl.SetOpt(.HTTPGet, true);
 		}
 
+		public void AddHeader(StringView header)
+		{
+			mHeaderList = mCurl.Add(mHeaderList, header);
+		}
+
 		public void InitPost(String url, String param)
 		{
 			Init(url);
@@ -154,6 +163,9 @@ namespace CURL
 
 		public Result<Span<uint8>> Perform()
 		{
+			if (mHeaderList != null)
+				mCurl.SetOpt(.HTTPHeader, mHeaderList);
+
 			mStatsTimer.Start();
 			var result = mCurl.Perform();
 			mStatsTimer.Stop();