diff --git a/include/boost/system/detail/error_category.hpp b/include/boost/system/detail/error_category.hpp
index 092fe7a..a205d81 100644
--- a/include/boost/system/detail/error_category.hpp
+++ b/include/boost/system/detail/error_category.hpp
@@ -173,9 +173,9 @@ public:
 namespace detail
 {
 
-static const boost::ulong_long_type generic_category_id = ( boost::ulong_long_type( 0xB2AB117A ) << 32 ) + 0x257EDF0D;
-static const boost::ulong_long_type system_category_id = ( boost::ulong_long_type( 0x8FAFD21E ) << 32 ) + 0x25C5E09B;
-static const boost::ulong_long_type interop_category_id = ( boost::ulong_long_type( 0x943F2817 ) << 32 ) + 0xFD3A8FAF;
+static const boost::ulong_long_type generic_category_id = ( boost::ulong_long_type( 0xB2AB117A ) << 32 ) + 0x257EDFD0;
+static const boost::ulong_long_type system_category_id = generic_category_id + 1;
+static const boost::ulong_long_type interop_category_id = generic_category_id + 2;
 
 BOOST_SYSTEM_CONSTEXPR inline bool failed_impl( int ev, error_category const & cat )
 {