diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index f41015e..43b284e 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -1,3 +1,4 @@
+add_subdirectory(bc)
 add_subdirectory(squall)
 add_subdirectory(system)
 add_subdirectory(typhoon)