diff --git a/src/Function1D.cu b/src/Function1D.cu
index 57d3065..b648e4a 100644
--- a/src/Function1D.cu
+++ b/src/Function1D.cu
@@ -8,11 +8,11 @@
 #include <cstddef>
 #include <cstdlib>
 #include <sys/types.h>
-#if THRUST_VERSION >= 200000
+
+//this 3 header, only need by cuda version >= 12
 #include <thrust/unique.h>
 #include <thrust/sort.h>
 #include <thrust/set_operations.h>
-#endif
 
 #include <thrust/device_vector.h>
 #include <thrust/transform.h>
@@ -55,22 +55,6 @@ __global__ void complexKernel(float *aInputRealData, float *aInputImagData, floa
     }
 }
 
-#if THRUST_VERSION >= 200000
-template<typename InputIterator,
-         typename OutputIterator,
-         typename UnaryFunction>
-void callThrustTransform(InputIterator aInput, OutputIterator aOutput, UnaryFunction aFunc){
-    thrust::transform(aInput, aOutput, aFunc);
-}
-#else
-template<typename InputIterator,
-         typename OutputIterator,
-         typename UnaryFunction>
-void callThrustTransform(InputIterator aInput, OutputIterator aOutput, UnaryFunction aFunc){
-    thrust::transform(thrust::device, aInput, aOutput, aFunc);  
-}
-#endif
-
 
 CudaMatrix Aurora::complex(const CudaMatrix &aMatrix)
 {
diff --git a/src/Function2D.cu b/src/Function2D.cu
index 3dcb6fa..553904b 100644
--- a/src/Function2D.cu
+++ b/src/Function2D.cu
@@ -11,10 +11,11 @@
 #include <iostream>
 
 #include <cmath>
-#if THRUST_VERSION >= 200000
+
+//this 2 header， only need by cuda version >= 12
 #include <thrust/sort.h>
 #include <thrust/set_operations.h>
-#endif
+
 #include <thrust/device_vector.h>
 #include <thrust/transform.h>
 #include <thrust/reduce.h>