diff --git a/CMakeLists.txt b/CMakeLists.txt
index 896e4134..e9252dce 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -59,6 +59,7 @@ set(NANA_SOURCE_DIR ${CMAKE_CURRENT_LIST_DIR}/source)
 set(NANA_SOURCE_SUBDIRS
         /.
         /detail
+        /detail/posix
         /filesystem
         /gui
         /gui/detail