diff --git a/examples/demo/CMakeLists.txt b/examples/demo/CMakeLists.txt
index ec6c08ca6..2437ab72b 100644
--- a/examples/demo/CMakeLists.txt
+++ b/examples/demo/CMakeLists.txt
@@ -28,16 +28,12 @@ find_package(VTKm REQUIRED QUIET)
 set(srcs Demo.cxx)
 
 if(TARGET vtkm_rendering)
-  set(backend "VTKM_DEVICE_ADAPTER_SERIAL")
+
   if(TARGET vtkm::cuda)
     vtkm_compile_as_cuda(cuda_srcs ${srcs})
     set(srcs ${cuda_srcs})
-    set(backend "VTKM_DEVICE_ADAPTER_CUDA")
-  elseif(TARGET vtkm::tbb)
-    set(backend "VTKM_DEVICE_ADAPTER_TBB")
   endif()
 
   add_executable(Demo ${srcs})
   target_link_libraries(Demo PRIVATE vtkm_rendering)
-  target_compile_definitions(Demo PRIVATE "VTKM_DEVICE_ADAPTER=${backend}")
 endif()