diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorDimensions.h b/unsupported/Eigen/CXX11/src/Tensor/TensorDimensions.h
index 2692563a9..52569a359 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorDimensions.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorDimensions.h
@@ -405,20 +405,20 @@ template <std::size_t n, std::size_t V1, std::size_t V2, std::size_t V3, std::si
 
 template <typename Dims1, typename Dims2, size_t n, size_t m>
 struct sizes_match_below_dim {
-  static inline bool run(Dims1&, Dims2&) {
+  static EIGEN_DEVICE_FUNC  inline bool run(Dims1&, Dims2&) {
     return false;
   }
 };
 template <typename Dims1, typename Dims2, size_t n>
 struct sizes_match_below_dim<Dims1, Dims2, n, n> {
-  static inline bool run(Dims1& dims1, Dims2& dims2) {
+  static EIGEN_DEVICE_FUNC  inline bool run(Dims1& dims1, Dims2& dims2) {
     return (array_get<n-1>(dims1) == array_get<n-1>(dims2)) &
         sizes_match_below_dim<Dims1, Dims2, n-1, n-1>::run(dims1, dims2);
   }
 };
 template <typename Dims1, typename Dims2>
 struct sizes_match_below_dim<Dims1, Dims2, 0, 0> {
-  static inline bool run(Dims1&, Dims2&) {
+  static EIGEN_DEVICE_FUNC  inline bool run(Dims1&, Dims2&) {
     return true;
   }
 };
@@ -427,7 +427,7 @@ struct sizes_match_below_dim<Dims1, Dims2, 0, 0> {
 
 
 template <typename Dims1, typename Dims2>
-bool dimensions_match(Dims1& dims1, Dims2& dims2) {
+EIGEN_DEVICE_FUNC bool dimensions_match(Dims1& dims1, Dims2& dims2) {
   return internal::sizes_match_below_dim<Dims1, Dims2, internal::array_size<Dims1>::value, internal::array_size<Dims2>::value>::run(dims1, dims2);
 }