diff --git a/src/templite/__init__.py b/src/templite/__init__.py
index d06ee2e825..8723d0dd4f 100644
--- a/src/templite/__init__.py
+++ b/src/templite/__init__.py
@@ -32,7 +32,7 @@ from polyglot.builtins import unicode_type
 
 
 class Templite:
-    auto_emit = re.compile(r'''(^['"])|(^[a-zA-Z0-9_\[\]'"]+$)''')
+    auto_emit = re.compile(r'''(^['"])|(^[a-zA-Z0-9_[\]'"]+$)''')
 
     def __init__(self, template, start='${', end='}$'):
         if len(start) != 2 or len(end) != 2: