diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorReductionCuda.h b/unsupported/Eigen/CXX11/src/Tensor/TensorReductionCuda.h
index 867654aff..91b6e68dd 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorReductionCuda.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorReductionCuda.h
@@ -119,7 +119,7 @@ struct FullReducer<Self, Op, GpuDevice, Vectorizable> {
     assert(false && "Should only be called on floats");
   }
 
-  static void run(const Self& self, Op& reducer, const GpuDevice& device, float* output) {
+  static EIGEN_DEVICE_FUNC void run(const Self& self, Op& reducer, const GpuDevice& device, float* output) {
     typedef typename Self::Index Index;
 
     const Index num_coeffs = array_prod(self.m_impl.dimensions());