diff --git a/src/libply/ply-utils.c b/src/libply/ply-utils.c
index ed9219c2..83334852 100644
--- a/src/libply/ply-utils.c
+++ b/src/libply/ply-utils.c
@@ -87,7 +87,7 @@ ply_open_unidirectional_pipe (int *sender_fd,
   assert (sender_fd != NULL);
   assert (receiver_fd != NULL);
 
-  if (pipe2 (pipe_fds, O_CLOEXEC | O_NONBLOCK) < 0)
+  if (pipe2 (pipe_fds, O_CLOEXEC) < 0)
     return false;
 
   *sender_fd = pipe_fds[1];