diff --git a/configure.py b/configure.py
index 5df0cb7efa..222afeada1 100755
--- a/configure.py
+++ b/configure.py
@@ -76,8 +76,8 @@ def get_flags():
                     return re.sub(r'^flags\s+: ', '', line).split()
 
 
-def add_tristate(arg_parser, name, dest, help):
-    arg_parser.add_argument('--enable-' + name, dest=dest, action='store_true', default=None,
+def add_tristate(arg_parser, name, dest, help, default=None):
+    arg_parser.add_argument('--enable-' + name, dest=dest, action='store_true', default=default,
                             help='Enable ' + help)
     arg_parser.add_argument('--disable-' + name, dest=dest, action='store_false', default=None,
                             help='Disable ' + help)