diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorDevice.h b/unsupported/Eigen/CXX11/src/Tensor/TensorDevice.h
index b6ea655f3..17f10c07b 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorDevice.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorDevice.h
@@ -144,7 +144,7 @@ template <typename ExpressionType> class TensorDevice<ExpressionType, GpuDevice>
 
   protected:
     const GpuDevice& m_device;
-    ExpressionType m_expression;
+    ExpressionType& m_expression;
 };
 #endif