diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorIndexList.h b/unsupported/Eigen/CXX11/src/Tensor/TensorIndexList.h
index 2d8c7b903..d3600eab3 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorIndexList.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorIndexList.h
@@ -246,7 +246,7 @@ struct tuple_coeff {
 
   template <typename... T>
   EIGEN_DEVICE_FUNC static constexpr bool value_known_statically(const Index i, const IndexTuple<T...>& t) {
-    return ((i == Idx) & is_compile_time_constant<typename IndexTupleExtractor<Idx, T...>::ValType>::value) ||
+    return ((i == Idx) && is_compile_time_constant<typename IndexTupleExtractor<Idx, T...>::ValType>::value) ||
         tuple_coeff<Idx-1, ValueT>::value_known_statically(i, t);
   }
 
@@ -468,7 +468,7 @@ struct index_statically_eq_impl {
 template <typename FirstType, typename... OtherTypes>
 struct index_statically_eq_impl<IndexList<FirstType, OtherTypes...> > {
   EIGEN_DEVICE_FUNC static constexpr bool run(const Index i, const Index value) {
-    return IndexList<FirstType, OtherTypes...>().value_known_statically(i) &
+    return IndexList<FirstType, OtherTypes...>().value_known_statically(i) &&
         (IndexList<FirstType, OtherTypes...>().get(i) == value);
   }
 };
@@ -476,7 +476,7 @@ struct index_statically_eq_impl<IndexList<FirstType, OtherTypes...> > {
 template <typename FirstType, typename... OtherTypes>
 struct index_statically_eq_impl<const IndexList<FirstType, OtherTypes...> > {
   EIGEN_DEVICE_FUNC static constexpr bool run(const Index i, const Index value) {
-    return IndexList<FirstType, OtherTypes...>().value_known_statically(i) &
+    return IndexList<FirstType, OtherTypes...>().value_known_statically(i) &&
         (IndexList<FirstType, OtherTypes...>().get(i) == value);
   }
 };
@@ -492,7 +492,7 @@ struct index_statically_ne_impl {
 template <typename FirstType, typename... OtherTypes>
 struct index_statically_ne_impl<IndexList<FirstType, OtherTypes...> > {
   EIGEN_DEVICE_FUNC static constexpr bool run(const Index i, const Index value) {
-    return IndexList<FirstType, OtherTypes...>().value_known_statically(i) &
+    return IndexList<FirstType, OtherTypes...>().value_known_statically(i) &&
         (IndexList<FirstType, OtherTypes...>().get(i) != value);
   }
 };
@@ -500,7 +500,7 @@ struct index_statically_ne_impl<IndexList<FirstType, OtherTypes...> > {
 template <typename FirstType, typename... OtherTypes>
 struct index_statically_ne_impl<const IndexList<FirstType, OtherTypes...> > {
   EIGEN_DEVICE_FUNC static constexpr bool run(const Index i, const Index value) {
-    return IndexList<FirstType, OtherTypes...>().value_known_statically(i) &
+    return IndexList<FirstType, OtherTypes...>().value_known_statically(i) &&
         (IndexList<FirstType, OtherTypes...>().get(i) != value);
   }
 };
@@ -516,7 +516,7 @@ struct index_statically_gt_impl {
 template <typename FirstType, typename... OtherTypes>
 struct index_statically_gt_impl<IndexList<FirstType, OtherTypes...> > {
   EIGEN_DEVICE_FUNC static constexpr bool run(const Index i, const Index value) {
-    return IndexList<FirstType, OtherTypes...>().value_known_statically(i) &
+    return IndexList<FirstType, OtherTypes...>().value_known_statically(i) &&
         (IndexList<FirstType, OtherTypes...>().get(i) > value);
   }
 };
@@ -524,7 +524,7 @@ struct index_statically_gt_impl<IndexList<FirstType, OtherTypes...> > {
 template <typename FirstType, typename... OtherTypes>
 struct index_statically_gt_impl<const IndexList<FirstType, OtherTypes...> > {
   EIGEN_DEVICE_FUNC static constexpr bool run(const Index i, const Index value) {
-    return IndexList<FirstType, OtherTypes...>().value_known_statically(i) &
+    return IndexList<FirstType, OtherTypes...>().value_known_statically(i) &&
         (IndexList<FirstType, OtherTypes...>().get(i) > value);
   }
 };
@@ -541,7 +541,7 @@ struct index_statically_lt_impl {
 template <typename FirstType, typename... OtherTypes>
 struct index_statically_lt_impl<IndexList<FirstType, OtherTypes...> > {
   EIGEN_DEVICE_FUNC static constexpr bool run(const Index i, const Index value) {
-    return IndexList<FirstType, OtherTypes...>().value_known_statically(i) &
+    return IndexList<FirstType, OtherTypes...>().value_known_statically(i) &&
         (IndexList<FirstType, OtherTypes...>().get(i) < value);
   }
 };
@@ -549,7 +549,7 @@ struct index_statically_lt_impl<IndexList<FirstType, OtherTypes...> > {
 template <typename FirstType, typename... OtherTypes>
 struct index_statically_lt_impl<const IndexList<FirstType, OtherTypes...> > {
   EIGEN_DEVICE_FUNC static constexpr bool run(const Index i, const Index value) {
-    return IndexList<FirstType, OtherTypes...>().value_known_statically(i) &
+    return IndexList<FirstType, OtherTypes...>().value_known_statically(i) &&
         (IndexList<FirstType, OtherTypes...>().get(i) < value);
   }
 };
@@ -566,7 +566,7 @@ struct index_pair_first_statically_eq_impl {
 template <typename FirstType, typename... OtherTypes>
 struct index_pair_first_statically_eq_impl<IndexPairList<FirstType, OtherTypes...> > {
   EIGEN_DEVICE_FUNC static constexpr bool run(const Index i, const Index value) {
-    return IndexPairList<FirstType, OtherTypes...>().value_known_statically(i) &
+    return IndexPairList<FirstType, OtherTypes...>().value_known_statically(i) &&
         (IndexPairList<FirstType, OtherTypes...>().operator[](i).first == value);
   }
 };
@@ -574,7 +574,7 @@ struct index_pair_first_statically_eq_impl<IndexPairList<FirstType, OtherTypes..
 template <typename FirstType, typename... OtherTypes>
 struct index_pair_first_statically_eq_impl<const IndexPairList<FirstType, OtherTypes...> > {
   EIGEN_DEVICE_FUNC static constexpr bool run(const Index i, const Index value) {
-    return IndexPairList<FirstType, OtherTypes...>().value_known_statically(i) &
+    return IndexPairList<FirstType, OtherTypes...>().value_known_statically(i) &&
         (IndexPairList<FirstType, OtherTypes...>().operator[](i).first == value);
   }
 };
@@ -591,7 +591,7 @@ struct index_pair_second_statically_eq_impl {
 template <typename FirstType, typename... OtherTypes>
 struct index_pair_second_statically_eq_impl<IndexPairList<FirstType, OtherTypes...> > {
   EIGEN_DEVICE_FUNC static constexpr bool run(const Index i, const Index value) {
-    return IndexPairList<FirstType, OtherTypes...>().value_known_statically(i) &
+    return IndexPairList<FirstType, OtherTypes...>().value_known_statically(i) &&
         (IndexPairList<FirstType, OtherTypes...>().operator[](i).second == value);
   }
 };
@@ -599,7 +599,7 @@ struct index_pair_second_statically_eq_impl<IndexPairList<FirstType, OtherTypes.
 template <typename FirstType, typename... OtherTypes>
 struct index_pair_second_statically_eq_impl<const IndexPairList<FirstType, OtherTypes...> > {
   EIGEN_DEVICE_FUNC static constexpr bool run(const Index i, const Index value) {
-    return IndexPairList<FirstType, OtherTypes...>().value_known_statically(i) &
+    return IndexPairList<FirstType, OtherTypes...>().value_known_statically(i) &&
         (IndexPairList<FirstType, OtherTypes...>().operator[](i).second == value);
   }
 };