diff --git a/ThirdParty/vtkm/vtkvtkm/vtk-m/CMake/VTKmWrappers.cmake b/ThirdParty/vtkm/vtkvtkm/vtk-m/CMake/VTKmWrappers.cmake
index 10ba21e..e88299e 100644
--- a/ThirdParty/vtkm/vtkvtkm/vtk-m/CMake/VTKmWrappers.cmake
+++ b/ThirdParty/vtkm/vtkvtkm/vtk-m/CMake/VTKmWrappers.cmake
@@ -175,7 +175,7 @@ function(vtkm_setup_job_pool)
     # will require 3GB of memory. To allow for other NON VTK-m jobs we leave at
     # least 3GB of memory as 'slop'.
     cmake_host_system_information(RESULT vtkm_mem_ QUERY TOTAL_PHYSICAL_MEMORY)
-    math(EXPR vtkm_pool_size "(${vtkm_mem_}/3072)-1")
+    math(EXPR vtkm_pool_size "(${vtkm_mem_}/10240 - 3072)-1")
 
     if (vtkm_pool_size LESS 1)
       set(vtkm_pool_size 1)