diff --git a/dlls/winhttp/request.c b/dlls/winhttp/request.c
index 62e9c75a77a..75a229d5764 100644
--- a/dlls/winhttp/request.c
+++ b/dlls/winhttp/request.c
@@ -2148,6 +2148,7 @@ static void drain_content( request_t *request )
     DWORD bytes_read;
     char buffer[2048];
 
+    refill_buffer( request, FALSE );
     for (;;)
     {
         if (!read_data( request, buffer, sizeof(buffer), &bytes_read, FALSE ) || !bytes_read) return;