diff --git a/src/opnsense/service/modules/template.py b/src/opnsense/service/modules/template.py
index 3e18ae455..cea69b873 100644
--- a/src/opnsense/service/modules/template.py
+++ b/src/opnsense/service/modules/template.py
@@ -32,6 +32,7 @@
 import os
 import os.path
 import glob
+import re
 import stat
 import syslog
 import collections
@@ -63,6 +64,7 @@ class Template(object):
         # register additional filters
         self._j2_env.filters['decode_idna'] = lambda x:x.decode('idna')
         self._j2_env.filters['encode_idna'] = self._encode_idna
+        self._j2_env.filters['regex_replace'] = lambda value, pattern, replacement: re.sub(pattern, replacement, value)
 
     @staticmethod
     def _encode_idna(x):