diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8cb9ded72..0020de417 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -417,6 +417,10 @@ add_subdirectory( libraries/gdtoa )
 add_subdirectory( libraries/enet )
 add_subdirectory( wadsrc )
 add_subdirectory( source )
+add_subdirectory( source/duke3d )
+add_subdirectory( source/blood )
+add_subdirectory( source/rr )
+add_subdirectory( source/sw )
 
 if( NOT CMAKE_CROSSCOMPILING )
 	export(TARGETS ${CROSS_EXPORTS} FILE "${CMAKE_BINARY_DIR}/ImportExecutables.cmake" )