diff --git a/lib/System/Unix/Path.inc b/lib/System/Unix/Path.inc
index b155213..5557282 100644
--- a/lib/System/Unix/Path.inc
+++ b/lib/System/Unix/Path.inc
@@ -375,6 +375,7 @@
     status->mode = buf.st_mode;
     status->user = buf.st_uid;
     status->group = buf.st_gid;
+    status->uniqueID = uint64_t(buf.st_ino);
     status->isDir  = S_ISDIR(buf.st_mode);
     status->isFile = S_ISREG(buf.st_mode);
   }
diff --git a/lib/System/Win32/Path.inc b/lib/System/Win32/Path.inc
index 1f809ec..f5edaa0 100644
--- a/lib/System/Win32/Path.inc
+++ b/lib/System/Win32/Path.inc
@@ -319,6 +319,13 @@
     status->user = 9999;    // Not applicable to Windows, so...
     status->group = 9999;   // Not applicable to Windows, so...
 
+    // FIXME: this is only unique if the file is accessed by the same file path.
+    // How do we do this for C:\dir\file and ..\dir\file ? Unix has inode
+    // numbers, but the concept doesn't exist in Windows.
+    status->uniqueID = 0;
+    for (unsigned i = 0; i < path.length(); ++i)
+      status->uniqueID += path[i];
+
     __int64 ft = *reinterpret_cast<__int64*>(&fi.ftLastWriteTime);
     status->modTime.fromWin32Time(ft);