diff --git a/gpu.cmake b/gpu.cmake
index e31d81de64dde6c206372e0f5cda99cf450f848f..ead5e26bca299819513e4f7639d5431d8973c927 100644
--- a/gpu.cmake
+++ b/gpu.cmake
@@ -1,4 +1,3 @@
-
 if(BUILD_NUMERIC_TESTS)
     set(CMAKE_CXX_STANDARD 17)
 endif()
@@ -43,7 +42,7 @@ IF (BUILD_VF_GPU)
     #add_subdirectory(apps/gpu/LBM/gridGeneratorTest)
     #add_subdirectory(apps/gpu/LBM/TGV_3D)
     #add_subdirectory(apps/gpu/LBM/TGV_3D_MultiGPU)
-    #add_subdirectory(apps/gpu/LBM/ActuatorLine)
+    add_subdirectory(apps/gpu/LBM/ActuatorLine)
 ELSE()
     MESSAGE( STATUS "exclude Virtual Fluids GPU." )
 ENDIF()