diff --git a/Optimal_transportation_reconstruction_2/demo/Optimal_transportation_reconstruction_2/CMakeLists.txt b/Optimal_transportation_reconstruction_2/demo/Optimal_transportation_reconstruction_2/CMakeLists.txt
index 865f2e74f8aa..97595c0cf1a3 100644
--- a/Optimal_transportation_reconstruction_2/demo/Optimal_transportation_reconstruction_2/CMakeLists.txt
+++ b/Optimal_transportation_reconstruction_2/demo/Optimal_transportation_reconstruction_2/CMakeLists.txt
@@ -28,7 +28,6 @@ if(CGAL_Qt6_FOUND AND Qt6_FOUND)
   set(CMAKE_AUTOUIC ON)
   set(CMAKE_AUTORCC ON)
 
-  add_definitions(-DQT_NO_KEYWORDS)
   set(CMAKE_INCLUDE_CURRENT_DIR ON)
 
   add_executable(Otr2_demo glviewer.cpp scene.cpp Otr2_demo.cpp window.cpp render.cpp dialog_options.cpp