diff --git a/source/examples/cubescape-gtk4/CMakeLists.txt b/source/examples/cubescape-gtk4/CMakeLists.txt
index 826d8d91..94749f30 100644
--- a/source/examples/cubescape-gtk4/CMakeLists.txt
+++ b/source/examples/cubescape-gtk4/CMakeLists.txt
@@ -26,12 +26,6 @@ endif()
 
 set(sources
     main.cpp
-    CubeScape.cpp
-    CubeScape.h
-    glutils.cpp
-    glutils.h
-    RawFile.cpp
-    RawFile.h
 )