diff --git a/unsupported/test/cxx11_tensor_argmax_cuda.cu b/unsupported/test/cxx11_tensor_argmax_cuda.cu
index 41ccbe974..c3f4bfa53 100644
--- a/unsupported/test/cxx11_tensor_argmax_cuda.cu
+++ b/unsupported/test/cxx11_tensor_argmax_cuda.cu
@@ -12,6 +12,7 @@
 #define EIGEN_TEST_FUNC cxx11_tensor_cuda
 #define EIGEN_USE_GPU
 
+#include <cuda_fp16.h>
 #include "main.h"
 #include <unsupported/Eigen/CXX11/Tensor>
 
diff --git a/unsupported/test/cxx11_tensor_cast_float16_cuda.cu b/unsupported/test/cxx11_tensor_cast_float16_cuda.cu
index f22b99de8..559aae269 100644
--- a/unsupported/test/cxx11_tensor_cast_float16_cuda.cu
+++ b/unsupported/test/cxx11_tensor_cast_float16_cuda.cu
@@ -13,7 +13,7 @@
 #define EIGEN_DEFAULT_DENSE_INDEX_TYPE int
 #define EIGEN_USE_GPU
 
-
+#include <cuda_fp16.h>
 #include "main.h"
 #include <unsupported/Eigen/CXX11/Tensor>
 
diff --git a/unsupported/test/cxx11_tensor_contract_cuda.cu b/unsupported/test/cxx11_tensor_contract_cuda.cu
index 98ac180ef..5282dc3b9 100644
--- a/unsupported/test/cxx11_tensor_contract_cuda.cu
+++ b/unsupported/test/cxx11_tensor_contract_cuda.cu
@@ -14,7 +14,7 @@
 #define EIGEN_DEFAULT_DENSE_INDEX_TYPE int
 #define EIGEN_USE_GPU
 
-
+#include <cuda_fp16.h>
 #include "main.h"
 #include <unsupported/Eigen/CXX11/Tensor>
 
diff --git a/unsupported/test/cxx11_tensor_cuda.cu b/unsupported/test/cxx11_tensor_cuda.cu
index 284b46803..29ea76857 100644
--- a/unsupported/test/cxx11_tensor_cuda.cu
+++ b/unsupported/test/cxx11_tensor_cuda.cu
@@ -13,7 +13,7 @@
 #define EIGEN_DEFAULT_DENSE_INDEX_TYPE int
 #define EIGEN_USE_GPU
 
-
+#include <cuda_fp16.h>
 #include "main.h"
 #include <unsupported/Eigen/CXX11/Tensor>
 
diff --git a/unsupported/test/cxx11_tensor_device.cu b/unsupported/test/cxx11_tensor_device.cu
index b6ca54d93..bbda95906 100644
--- a/unsupported/test/cxx11_tensor_device.cu
+++ b/unsupported/test/cxx11_tensor_device.cu
@@ -13,7 +13,7 @@
 #define EIGEN_DEFAULT_DENSE_INDEX_TYPE int
 #define EIGEN_USE_GPU
 
-
+#include <cuda_fp16.h>
 #include "main.h"
 #include <unsupported/Eigen/CXX11/Tensor>
 
diff --git a/unsupported/test/cxx11_tensor_random_cuda.cu b/unsupported/test/cxx11_tensor_random_cuda.cu
index fa1a46732..32f71e808 100644
--- a/unsupported/test/cxx11_tensor_random_cuda.cu
+++ b/unsupported/test/cxx11_tensor_random_cuda.cu
@@ -13,6 +13,7 @@
 #define EIGEN_DEFAULT_DENSE_INDEX_TYPE int
 #define EIGEN_USE_GPU
 
+#include <cuda_fp16.h>
 #include "main.h"
 #include <Eigen/CXX11/Tensor>
 
diff --git a/unsupported/test/cxx11_tensor_reduction_cuda.cu b/unsupported/test/cxx11_tensor_reduction_cuda.cu
index 6d8f01c02..9b5e60e99 100644
--- a/unsupported/test/cxx11_tensor_reduction_cuda.cu
+++ b/unsupported/test/cxx11_tensor_reduction_cuda.cu
@@ -12,6 +12,7 @@
 #define EIGEN_TEST_FUNC cxx11_tensor_reduction_cuda
 #define EIGEN_USE_GPU
 
+#include <cuda_fp16.h>
 #include "main.h"
 #include <unsupported/Eigen/CXX11/Tensor>
 
diff --git a/unsupported/test/cxx11_tensor_scan_cuda.cu b/unsupported/test/cxx11_tensor_scan_cuda.cu
index 35e19e51c..c8a99f62b 100644
--- a/unsupported/test/cxx11_tensor_scan_cuda.cu
+++ b/unsupported/test/cxx11_tensor_scan_cuda.cu
@@ -13,7 +13,7 @@
 #define EIGEN_DEFAULT_DENSE_INDEX_TYPE int
 #define EIGEN_USE_GPU
 
-
+#include <cuda_fp16.h>
 #include "main.h"
 #include <unsupported/Eigen/CXX11/Tensor>