diff --git a/erpnext/setup/doctype/naming_series/naming_series.py b/erpnext/setup/doctype/naming_series/naming_series.py
index 6d1b7e9..5a12051 100644
--- a/erpnext/setup/doctype/naming_series/naming_series.py
+++ b/erpnext/setup/doctype/naming_series/naming_series.py
@@ -117,8 +117,8 @@
 
 	def validate_series_name(self, n):
 		import re
-		if not re.match("^[a-zA-Z0-9- /.#]*$", n):
-			throw(_('Special Characters except "-" and "/" not allowed in naming series'))
+		if not re.match("^[\w- /.#]*$", n, re.UNICODE):
+			throw(_('Special Characters except "-", "#", "." and "/" not allowed in naming series'))
 
 	def get_options(self, arg=None):
 		return frappe.get_meta(arg or self.select_doc_for_series).get_field("naming_series").options