diff --git a/configs/example/fs.py b/configs/example/fs.py
index 11d7d43f0f..08484559a9 100644
--- a/configs/example/fs.py
+++ b/configs/example/fs.py
@@ -167,7 +167,7 @@ if options.caches or options.l2cache:
     test_sys.iocache.mem_side = test_sys.membus.port
 else:
     test_sys.iobridge = Bridge(delay='50ns', nack_delay='4ns',
-                               ranges = [AddrRange(0, mem_size)])
+                               ranges = [AddrRange(mem_size)])
     test_sys.iobridge.slave = test_sys.iobus.port
     test_sys.iobridge.master = test_sys.membus.port