diff --git a/py/path/svn/svncommon.py b/py/path/svn/svncommon.py
index f378dc747..d982ac365 100644
--- a/py/path/svn/svncommon.py
+++ b/py/path/svn/svncommon.py
@@ -5,7 +5,7 @@ import os, sys, time, re, string
 import py
 from py.__.path import common
 
-ALLOWED_CHARS = "_ -/\\=$.~" #add characters as necessary when tested
+ALLOWED_CHARS = "_ -/\\=$.~+" #add characters as necessary when tested
 if sys.platform == "win32":
     ALLOWED_CHARS += ":"
 ALLOWED_CHARS_HOST = ALLOWED_CHARS + '@:'