diff --git a/dlls/wininet/http.c b/dlls/wininet/http.c
index 4b6acdc..7b5c748 100644
--- a/dlls/wininet/http.c
+++ b/dlls/wininet/http.c
@@ -3244,12 +3244,19 @@ static DWORD HTTPREQ_ReadFile(object_header_t *hdr, void *buffer, DWORD size, DW
 
         if (TryEnterCriticalSection( &req->read_section ))
         {
+            refill_read_buffer(req, BLOCKING_DISALLOW, NULL);
             if (get_avail_data(req))
             {
                 res = HTTPREQ_Read(req, buffer, size, read);
                 LeaveCriticalSection( &req->read_section );
                 return res;
             }
+            if (end_of_read_data(req))
+            {
+                *read = 0;
+                LeaveCriticalSection( &req->read_section );
+                return ERROR_SUCCESS;
+            }
             LeaveCriticalSection( &req->read_section );
         }