diff --git a/examples/README.txt b/examples/README.txt
index 869451b2b..f63d9939f 100644
--- a/examples/README.txt
+++ b/examples/README.txt
@@ -1873,6 +1873,9 @@ examples/unionfs
     CONFIG_EXAMPLES_UNIONFS_RAMDEVNO_B - ROMFS file system 2 RAM disk device number
     CONFIG_EXAMPLES_UNIONFS_SECTORSIZE - ROM disk sector size.
 
+  See the README.txt file at nuttx/configs/sim/README.txt for a walk-through of
+  the output of this text.
+
 examples/usbserial
 ^^^^^^^^^^^^^^^^^^
 
diff --git a/examples/unionfs/atestdir/adir/adirfile.txt b/examples/unionfs/atestdir/adir/adirfile.txt
deleted file mode 100644
index 9e35f0539..000000000
--- a/examples/unionfs/atestdir/adir/adirfile.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-This is a file in directory adir on file system 1
-
diff --git a/examples/unionfs/atestdir/adir/asubdir/asubdirfile.txt b/examples/unionfs/atestdir/adir/asubdir/asubdirfile.txt
deleted file mode 100644
index 0ff2a0439..000000000
--- a/examples/unionfs/atestdir/adir/asubdir/asubdirfile.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-This is a file in directory adir/asubdir on file system 1
-
diff --git a/examples/unionfs/atestdir/offset/adir/adirfile.txt b/examples/unionfs/atestdir/offset/adir/adirfile.txt
new file mode 100644
index 000000000..76f9e4a24
--- /dev/null
+++ b/examples/unionfs/atestdir/offset/adir/adirfile.txt
@@ -0,0 +1,2 @@
+This is a file in directory offset/adir on file system 1
+
diff --git a/examples/unionfs/atestdir/offset/adir/asubdir/asubdirfile.txt b/examples/unionfs/atestdir/offset/adir/asubdir/asubdirfile.txt
new file mode 100644
index 000000000..8c5c8ee61
--- /dev/null
+++ b/examples/unionfs/atestdir/offset/adir/asubdir/asubdirfile.txt
@@ -0,0 +1,2 @@
+This is a file in directory offset/adir/asubdir on file system 1
+
diff --git a/examples/unionfs/atestdir/offset/afile.txt b/examples/unionfs/atestdir/offset/afile.txt
new file mode 100644
index 000000000..1cce109c7
--- /dev/null
+++ b/examples/unionfs/atestdir/offset/afile.txt
@@ -0,0 +1 @@
+This is a file in the offset/ directory on file system 1
diff --git a/examples/unionfs/unionfs_main.c b/examples/unionfs/unionfs_main.c
index c05879acf..bf62098b1 100644
--- a/examples/unionfs/unionfs_main.c
+++ b/examples/unionfs/unionfs_main.c
@@ -188,7 +188,7 @@ int unionfs_main(int argc, char *argv[])
   /* Now create and mount the union file system */
 
   ret = unionfs_mount(CONFIG_EXAMPLES_UNIONFS_TMPA, NULL,
-                      CONFIG_EXAMPLES_UNIONFS_TMPB, NULL,
+                      CONFIG_EXAMPLES_UNIONFS_TMPB, "offset",
                       CONFIG_EXAMPLES_UNIONFS_MOUNTPT);
   if (ret < 0)
     {