diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorReductionCuda.h b/unsupported/Eigen/CXX11/src/Tensor/TensorReductionCuda.h
index 5d9205b59..20dc72e85 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorReductionCuda.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorReductionCuda.h
@@ -131,6 +131,7 @@ struct FullReducer<Self, Op, GpuDevice, Vectorizable> {
   }
 };
 
+#define DIVUP(x, y) (((x) + (y)-1) / (y))
 
 template <int NumPerThread, typename Self,
           typename Reducer, typename Index>
@@ -185,6 +186,8 @@ struct OuterReducer<Self, Op, GpuDevice> {
   }
 };
 
+#undef DIVUP
+
 #endif