diff --git a/Doc/howto/ipaddress.rst b/Doc/howto/ipaddress.rst
index ebbf1521d11..f855df8cfe0 100644
--- a/Doc/howto/ipaddress.rst
+++ b/Doc/howto/ipaddress.rst
@@ -288,4 +288,4 @@ you can still do the following::
    try:
        ipaddress.IPv4Address(address)
    except ValueError:
-       print 'address/netmask is invalid: %s' % address
+       print('address/netmask is invalid:', address)