diff --git a/IPython/ipmaker.py b/IPython/ipmaker.py
index 8652c50..e98f5e8 100644
--- a/IPython/ipmaker.py
+++ b/IPython/ipmaker.py
@@ -230,6 +230,7 @@ object?   -> Details about 'object'. ?object also works, ?? prints more.
                       prompt_in2 = '   .\\D.: ',
                       prompt_out = 'Out[\\#]: ',
                       prompts_pad_left = 1,
+                      pydb = 0,
                       pylab = 0,
                       pylab_import_all = 1,
                       q4thread = 0,