https://bugs.gentoo.org/963749
https://gitlab.isc.org/isc-projects/kea/-/issues/4085
https://gitlab.isc.org/isc-projects/kea/-/merge_requests/2771
Fixes the build with Boost 1.89
diff --git a/meson.build b/meson.build
index ab2fa78212..8592196856 100644
--- a/meson.build
+++ b/meson.build
@@ -189,7 +189,7 @@ message(f'Detected system "@SYSTEM@".')
 
 #### Dependencies
 
-boost_dep = dependency('boost', version: '>=1.66', modules: ['system'])
+boost_dep = dependency('boost', version: '>=1.66')
 dl_dep = dependency('dl')
 threads_dep = dependency('threads')
 add_project_dependencies(boost_dep, dl_dep, threads_dep, language: ['cpp'])
diff --git a/src/lib/asiodns/io_fetch.cc b/src/lib/asiodns/io_fetch.cc
index c140676f66..ee2575a884 100644
--- a/src/lib/asiodns/io_fetch.cc
+++ b/src/lib/asiodns/io_fetch.cc
@@ -24,6 +24,7 @@
 
 #include <boost/scoped_ptr.hpp>
 #include <boost/date_time/posix_time/posix_time_types.hpp>
+#include <boost/asio/deadline_timer.hpp>
 
 #include <functional>
 #include <unistd.h>             // for some IPC/network system calls
diff --git a/src/lib/asiodns/tests/io_fetch_unittest.cc b/src/lib/asiodns/tests/io_fetch_unittest.cc
index 7b4cd0568e..3d04230f02 100644
--- a/src/lib/asiodns/tests/io_fetch_unittest.cc
+++ b/src/lib/asiodns/tests/io_fetch_unittest.cc
@@ -21,6 +21,7 @@
 
 #include <gtest/gtest.h>
 #include <boost/date_time/posix_time/posix_time_types.hpp>
+#include <boost/asio/deadline_timer.hpp>
 
 #include <algorithm>
 #include <cstdlib>
diff --git a/src/lib/asiolink/interval_timer.cc b/src/lib/asiolink/interval_timer.cc
index fa0d9e1b67..4ac0b20c7d 100644
--- a/src/lib/asiolink/interval_timer.cc
+++ b/src/lib/asiolink/interval_timer.cc
@@ -12,6 +12,7 @@
 #include <boost/enable_shared_from_this.hpp>
 #include <boost/noncopyable.hpp>
 #include <boost/shared_ptr.hpp>
+#include <boost/asio/deadline_timer.hpp>
 
 #include <exceptions/exceptions.h>