diff --git a/src/Curl/Easy.jl b/src/Curl/Easy.jl
index 4855010..866657a 100644
--- a/src/Curl/Easy.jl
+++ b/src/Curl/Easy.jl
@@ -369,15 +369,13 @@ end
 # feed data to read_callback
 function upload_data(easy::Easy, input::IO)
     while true
-        if easy.input === nothing || isempty(easy.input)
-            data = eof(input) ? nothing : readavailable(input)
-            easy.input === nothing && break
-            easy.input = data
-        end
+        data = eof(input) ? nothing : readavailable(input)
+        easy.input === nothing && break
+        reset(easy.input)
+        easy.input = data
         curl_easy_pause(easy.handle, Curl.CURLPAUSE_CONT)
         wait(easy.ready)
         easy.input === nothing && break
-        easy.ready = Threads.Event()
     end
 end