diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorUInt128.h b/unsupported/Eigen/CXX11/src/Tensor/TensorUInt128.h
index 4f2adb671..f43f64cde 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorUInt128.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorUInt128.h
@@ -34,11 +34,11 @@ struct TensorUInt128
   LOW low;
 
   EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE
-  TensorUInt128(int x) : high(0), low(x) {
+  TensorUInt128(int32_t x) : high(0), low(x) {
     eigen_assert(x >= 0);
   }
   EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE
-  TensorUInt128(unsigned int x) : high(0), low(x) { }
+  TensorUInt128(uint32_t x) : high(0), low(x) { }
   EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE
   TensorUInt128(int64_t x) : high(0), low(x) {
     eigen_assert(x >= 0);