The IPv4 overload takes a IPv4Address, which is just an quint32, so it doesn't matter whether clients call it with a const or a mutable argument. The IPv6 overload, OTOH, took a IPv6Address, which is a typedef for quint8[16]. This allows users to pass a quint16[16], but not a const quint8[16], because that would lose the const. The function, however, doesn't modify the argument, so it could be const. Make it so, even though, due to the typedef, it looks like a redundant top-level const. Change-Id: I0506f6f9026ad616c4450fceb45fea137ac27692 Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>