diff --git grep-clean/src/grep.c grep-workdir/src/grep.c
index 491dd02..5a0250a 100644
--- grep-clean/src/grep.c
+++ grep-workdir/src/grep.c
@@ -1774,7 +1774,7 @@ drain_input (int fd, struct stat const *st)
   ssize_t nbytes;
   if (S_ISFIFO (st->st_mode) && dev_null_output)
     {
-#ifdef SPLICE_F_MOVE
+#if 0
       /* Should be faster, since it need not copy data to user space.  */
       nbytes = splice (fd, NULL, STDOUT_FILENO, NULL,
                        INITIAL_BUFSIZE, SPLICE_F_MOVE);