diff --git a/akanda/router/drivers/ip.py b/akanda/router/drivers/ip.py
index f900382..9bc2c38 100644
--- a/akanda/router/drivers/ip.py
+++ b/akanda/router/drivers/ip.py
@@ -196,7 +196,7 @@ class IPManager(base.Manager):
             """
             family = {4: 'inet', 6: 'inet6'}[address[0].version]
             args = ['addr', cmd, '%s/%s' % (address[0], address[1])]
-            if cmd == 'add':
+            if family == 'inet' and cmd == 'add':
                 args += ['brd', '+']
             args += ['dev', real_ifname]
             if family == 'inet6':
diff --git a/test/unit/drivers/test_ip.py b/test/unit/drivers/test_ip.py
index 6827c94..12c3e1c 100644
--- a/test/unit/drivers/test_ip.py
+++ b/test/unit/drivers/test_ip.py
@@ -261,8 +261,7 @@ class IPTestCase(TestCase):
                 mock.call([cmd, 'addr', 'show', 'em0']),
                 mock.call([
                     cmd, '-6', 'addr', 'add',
-                    'fdca:3ba5:a17a:acda:20c:29ff:fe94:723d/64', 'brd', '+',
-                    'dev', 'em0'
+                    'fdca:3ba5:a17a:acda:20c:29ff:fe94:723d/64', 'dev', 'em0'
                 ], 'sudo'),
                 mock.call([cmd, 'link', 'set', 'em0', 'up'], 'sudo'),
                 mock.call([cmd, 'addr', 'show', 'em0'])
@@ -367,8 +366,7 @@ class IPTestCase(TestCase):
                 mock.call([cmd, 'link', 'set', 'eth0', 'up'], 'sudo'),
                 mock.call([
                     cmd, '-6', 'addr', 'add',
-                    'fdca:3ba5:a17a:acda:f816:3eff:fe34:ba28/64', 'brd', '+',
-                    'dev', 'eth0'
+                    'fdca:3ba5:a17a:acda:f816:3eff:fe34:ba28/64', 'dev', 'eth0'
                 ], 'sudo'),
                 mock.call([cmd, 'link', 'set', 'eth0', 'up'], 'sudo')
             ]