1 files changed, 2 insertions, 2 deletions
diff --git a/docutils/tools/buildhtml.py b/docutils/tools/buildhtml.py
index 5cd8ef706..e1d58432c 100755
--- a/docutils/tools/buildhtml.py
+++ b/docutils/tools/buildhtml.py
@@ -107,7 +107,7 @@ class OptionParser(frontend.OptionParser):
         return source, destination
 
 
-class Struct:
+class Struct(object):
 
     """Stores data attributes for dotted-attribute access."""
 
@@ -115,7 +115,7 @@ class Struct:
         self.__dict__.update(keywordargs)
 
 
-class Builder:
+class Builder(object):
 
     def __init__(self):
         self.publishers = {