diff --git a/library/CMakeLists.txt b/library/CMakeLists.txt
index ce44079cf..9c8d4d51b 100644
--- a/library/CMakeLists.txt
+++ b/library/CMakeLists.txt
@@ -91,6 +91,8 @@ modules/Position_C.cpp
 modules/Materials_C.cpp
 modules/Translation_C.cpp
 modules/Vegetation_C.cpp
+modules/WindowIO_C.cpp
+modules/World_C.cpp
 )
 
 SET(PROJECT_HDRS_LINUX