diff --git a/src/exec.cxx b/src/exec.cxx
index 1a23582..a14c5d8 100644
--- a/src/exec.cxx
+++ b/src/exec.cxx
@@ -448,9 +448,9 @@ mrw::PartialExec& mrw::PartialExec::start(bool useInput)
   _finish = !useInput;
   _input = "";
   _res = _err = "";
-  _stdIn = std::auto_ptr<mrw::Pipe>(new mrw::Pipe(mrw::Pipe::block_input));
-  _stdOut = std::auto_ptr<mrw::Pipe>(new mrw::Pipe(mrw::Pipe::block_output));
-  _stdErr = std::auto_ptr<mrw::Pipe>(new mrw::Pipe(mrw::Pipe::block_output));
+  _stdIn = std::shared_ptr<mrw::Pipe>(new mrw::Pipe(mrw::Pipe::block_input));
+  _stdOut = std::shared_ptr<mrw::Pipe>(new mrw::Pipe(mrw::Pipe::block_output));
+  _stdErr = std::shared_ptr<mrw::Pipe>(new mrw::Pipe(mrw::Pipe::block_output));
   if (!*_stdIn || !*_stdOut || !*_stdErr)
     throw mrw::ExecutionFailedExc("cannot create pipe", *_cmd);
   _lastPid = 0;