Index: main.c
===================================================================
--- main.c	(revision 14773)
+++ main.c	(working copy)
@@ -283,13 +283,15 @@
         }
     }
 
-  if (os->ind >= argc || os->ind < argc - 2)
+  if (os->ind > argc || os->ind < argc - 2)
     {
       usage(pool);
       return EXIT_FAILURE;
     }
 
-  SVN_INT_ERR (svn_utf_cstring_to_utf8 (&wc_path, os->argv[os->ind++], pool));
+  SVN_INT_ERR (svn_utf_cstring_to_utf8 (&wc_path, 
+			  (os->ind == argc) ? "." : os->argv[os->ind++], 
+			  pool));
   wc_path = svn_path_internal_style (wc_path, pool);
   SVN_INT_ERR (svn_wc_check_wc (wc_path, &wc_format, pool));
   if (! wc_format)