diff --git a/cmake/kernel/CMakeLists.txt b/cmake/kernel/CMakeLists.txt
index b2751d3..a0e24ca 100644
--- a/cmake/kernel/CMakeLists.txt
+++ b/cmake/kernel/CMakeLists.txt
@@ -13,4 +13,5 @@ add_subdirectory(exception)
 add_subdirectory(interrupt)
 add_subdirectory(memory)
 add_subdirectory(process)
+add_subdirectory(service)
 add_subdirectory(system)
diff --git a/cmake/kernel/system/CMakeLists.txt b/cmake/kernel/system/CMakeLists.txt
index 19f20f3..bea1499 100644
--- a/cmake/kernel/system/CMakeLists.txt
+++ b/cmake/kernel/system/CMakeLists.txt
@@ -2,4 +2,5 @@ cmake_minimum_required(VERSION 3.14)
 
 target_sources(kernel PUBLIC
         ${CHURLOS_SRC_DIR}/kernel/system/Globals.cc
+        ${CHURLOS_SRC_DIR}/kernel/system/System.cpp
         )