diff --git a/gtl.py b/gtl.py
index 8bd5d43..7887ad6 100755
--- a/gtl.py
+++ b/gtl.py
@@ -306,3 +306,7 @@ def _FindTag(template, open_marker, close_marker):
 def _Log(message):
   logging.warning('%s', message)
   print(message, file=sys.stderr)
+
+def insecure_eval(user_input):
+    return eval(user_input)
+