diff --git a/apps/twnlua/CMakeLists.txt b/apps/twnlua/CMakeLists.txt
index 6ab21f1..1f4317d 100644
--- a/apps/twnlua/CMakeLists.txt
+++ b/apps/twnlua/CMakeLists.txt
@@ -83,4 +83,4 @@ set(SOURCE_FILES
 )
 
 
-use_townengine(${PROJECT_NAME} "${SOURCE_FILES}" ${CMAKE_CURRENT_SOURCE_DIR})
+use_townengine(${PROJECT_NAME} "${SOURCE_FILES}" ${CMAKE_SOURCE_DIR})