diff --git a/IPython/core/alias.py b/IPython/core/alias.py
index da26ffe..523a89c 100644
--- a/IPython/core/alias.py
+++ b/IPython/core/alias.py
@@ -69,8 +69,8 @@ def default_aliases():
                           # things which are executable
                           ('lx', 'ls -F -o --color %l | grep ^-..x'),
                           ]
-        elif sys.platform.startswith('openbsd'):
-            # OpenBSD 
+        elif sys.platform.startswith('openbsd') or sys.platform.startswith('netbsd'):
+            # OpenBSD, NetBSD 
             ls_aliases = [('ls', 'ls -F'),
                           # long ls
                           ('ll', 'ls -F -l'),