diff --git a/asio/include/asio/ip/address_v6.hpp b/asio/include/asio/ip/address_v6.hpp
index 87bb6d45..ce5eeb00 100644
--- a/asio/include/asio/ip/address_v6.hpp
+++ b/asio/include/asio/ip/address_v6.hpp
@@ -300,7 +300,7 @@ public:
   {
     using namespace std; // For memcmp.
     int memcmp_result = memcmp(&a1.addr_, &a2.addr_,
-        sizeof(asio::detail::in6_addr_type)) < 0;
+        sizeof(asio::detail::in6_addr_type));
     if (memcmp_result < 0)
       return true;
     if (memcmp_result > 0)