diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4fe900d4694e..483108a68419 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -210,7 +210,7 @@ if(USE_CUDA)
   find_package(CUDA REQUIRED)
   add_definitions(-DMSHADOW_USE_CUDA=1)
   if(FIRST_CUDA AND (NOT USE_OLDCMAKECUDA))
-    if(CUDA_TOOLSET STREQUAL "")
+    if(NOT CUDA_TOOLSET)
       set(CUDA_TOOLSET "${CUDA_VERSION_STRING}")
     endif()
     set(CMAKE_GENERATOR_TOOLSET "cuda=${CUDA_TOOLSET},host=x64")