diff --git a/pystache/locator.py b/pystache/locator.py
index 30c5b01e..364b6d55 100644
--- a/pystache/locator.py
+++ b/pystache/locator.py
@@ -91,7 +91,7 @@ def make_file_name(self, template_name, template_extension=None):
         if template_extension is None:
             template_extension = self.template_extension
 
-        if template_extension is not False:
+        if template_extension:
             file_name += os.path.extsep + template_extension
 
         return file_name