diff --git a/tldp/driver.py b/tldp/driver.py
index 553a6d2..59dabdf 100644
--- a/tldp/driver.py
+++ b/tldp/driver.py
@@ -16,7 +16,8 @@ from tldp.sources import SourceDocument, arg_issourcedoc
 from tldp.outputs import OutputDirectory
 from tldp.inventory import Inventory, status_classes, status_types, stypes
 from tldp.config import collectconfiguration
-from tldp.utils import arg_isloglevel, arg_isdirectory, swapdirs
+from tldp.utils import arg_isloglevel, arg_isdirectory
+from tldp.utils import swapdirs, sameFilesystem
 from tldp.doctypes.common import preamble, postamble
 
 logformat = '%(levelname)-9s %(name)s %(filename)s#%(lineno)s ' \
@@ -39,7 +40,6 @@ ERR_UNKNOWNARGS = "Unknown arguments received: "
 ERR_EXTRAARGS = "Extra arguments received: "
 
 
-
 def show_doctypes(config, *args, **kwargs):
     if args:
         return ERR_EXTRAARGS + ' '.join(args)
@@ -368,10 +368,6 @@ def extractExplicitDocumentArgs(config, args):
     return docs, remainder
 
 
-def sameFilesystem(d0, d1):
-    return os.stat(d0).st_dev == os.stat(d1).st_dev
-
-
 def collectWorkset(config, args):
     # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
     # -- argument handling logic; try to avoid creating an inventory unless it
diff --git a/tldp/utils.py b/tldp/utils.py
index adec896..4e8a295 100644
--- a/tldp/utils.py
+++ b/tldp/utils.py
@@ -75,6 +75,10 @@ def arg_isexecutable(f):
     return None
 
 
+def sameFilesystem(d0, d1):
+    return os.stat(d0).st_dev == os.stat(d1).st_dev
+
+
 def stem_and_ext(name):
     '''return (stem, ext) for any relative or absolute filename'''
     return os.path.splitext(os.path.basename(os.path.normpath(name)))