diff --git a/src/future/exec/ExecFuture.php b/src/future/exec/ExecFuture.php
--- a/src/future/exec/ExecFuture.php
+++ b/src/future/exec/ExecFuture.php
@@ -599,24 +599,7 @@
     }
 
     do {
-      $real_length = $length;
-    
-      // On Windows, we must check to see if we can read without blocking
-      // from the stream, and even then we must read only 1 byte at a time.
-      if ($this->useWindowsFileStreams) {
-        $r = array($stream);
-        $w = array();
-        $e = array();
-        if (false === stream_select($r, $w, $e, 0)) {
-          throw new Exception('stream_select() failed');
-        }
-        $real_length = 0;
-        if (in_array($stream, $r)) {
-          $real_length = 1;
-        }
-      }
-    
-      $data = fread($stream, min($real_length, 64 * 1024));
+      $data = fread($stream, min($length, 64 * 1024));
       if (false === $data) {
         throw new Exception('Failed to read from '.$description);
       }