diff --git a/etgtools/pi_generator.py b/etgtools/pi_generator.py
index 2db68a25..7809318e 100644
--- a/etgtools/pi_generator.py
+++ b/etgtools/pi_generator.py
@@ -231,6 +231,8 @@ class PiWrapperGenerator(generators.WrapperGeneratorBase):
         stream.write('%sclass %s' % (indent, pc.name))
         if pc.bases:
             stream.write('(%s):\n' % ', '.join(pc.bases))
+        else:
+            stream.write('(object):\n')
         indent2 = indent + ' '*4
         if pc.briefDoc:
             stream.write('%s"""\n' % indent2)
@@ -316,6 +318,8 @@ class PiWrapperGenerator(generators.WrapperGeneratorBase):
             bases = [removeWxPrefix(b) for b in bases]
             stream.write(', '.join(bases))
             stream.write(')')
+        else:
+            stream.write('(object)')
         stream.write(':\n')
         indent2 = indent + ' '*4
         
diff --git a/etgtools/sip_generator.py b/etgtools/sip_generator.py
index 7dcc99fa..e048c226 100644
--- a/etgtools/sip_generator.py
+++ b/etgtools/sip_generator.py
@@ -370,6 +370,8 @@ from .%s import *
         stream.write('%sclass %s' % (indent, pc.name))
         if pc.bases:
             stream.write('(%s):\n' % ', '.join(pc.bases))
+        else:
+            stream.write('(object):\n')
         indent2 = indent + ' '*4
         if pc.briefDoc:
             stream.write('%s"""\n' % indent2)