diff --git a/src/du.c b/src/du.c

index e4e36df..41c9535 100644

--- a/src/du.c

+++ b/src/du.c

@@ -443,7 +443,14 @@ process_file (FTS *fts, FTSENT *ent)

               return false;

             }

-          if (fts->fts_options & FTS_XDEV && fts->fts_dev != sb->st_dev)

+          /* The --one-file-system (-x) option cannot exclude anything

+             specified on the command-line.  By definition, it can exclude

+             a file or directory only when its device number is different

+             from that of its just-processed parent directory, and du does

+             not process the parent of a command-line argument.  */

+          if (fts->fts_options & FTS_XDEV

+              && FTS_ROOTLEVEL < ent->fts_level

+              && fts->fts_dev != sb->st_dev)

             excluded = true;

         }

diff --git a/tests/du/one-file-system b/tests/du/one-file-system

index f0d264a..110080f 100755

--- a/tests/du/one-file-system

+++ b/tests/du/one-file-system

@@ -43,7 +43,15 @@ compare exp out || fail=1

 du -xL d > u || fail=1

 sed 's/^[0-9][0-9]*	//' u > out1

 echo d > exp1 || fail=1

-

 compare exp1 out1 || fail=1

+# With coreutils-8.15, "du -xs FILE" would print no output.

+touch f

+for opt in -x -xs; do

+  du $opt f > u || fail=1

+  sed 's/^[0-9][0-9]*	//' u > out2

+  echo f > exp2 || fail=1

+  compare exp2 out2 || fail=1

+done

+

 Exit $fail

--

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