1 files changed, 1 insertions, 1 deletions

diff --git a/src/fs/gnunet-helper-fs-publish.c b/src/fs/gnunet-helper-fs-publish.c
index 55836e772..72a656de1 100644
--- a/src/fs/gnunet-helper-fs-publish.c
+++ b/src/fs/gnunet-helper-fs-publish.c
@@ -480,7 +480,7 @@ make_dev_zero (int fd,
   GNUNET_assert (-1 != z);
   if (z == fd)
     return;
-  dup2 (z, fd);
+  GNUNET_break (fd == dup2 (z, fd));
   GNUNET_assert (0 == close (z));
 }