diff --git a/SYCLStream.cpp b/SYCLStream.cpp
index 8960530..8ab642f 100644
--- a/SYCLStream.cpp
+++ b/SYCLStream.cpp
@@ -17,7 +17,7 @@ std::vector<device> devices;
 void getDeviceList(void);
 
 template <class T>
-SYCLStream<T>::SYCLStream(const unsigned int ARRAY_SIZE, const int device_index)
+SYCLStream<T>::SYCLStream(const int ARRAY_SIZE, const int device_index)
 {
   if (!cached)
     getDeviceList();
diff --git a/SYCLStream.h b/SYCLStream.h
index ab62ecd..df10946 100644
--- a/SYCLStream.h
+++ b/SYCLStream.h
@@ -30,7 +30,7 @@ class SYCLStream : public Stream<T>
 {
   protected:
     // Size of arrays
-    unsigned int array_size;
+    int array_size;
 
     // SYCL objects
     cl::sycl::queue *queue;
@@ -53,7 +53,7 @@ class SYCLStream : public Stream<T>
 
   public:
 
-    SYCLStream(const unsigned int, const int);
+    SYCLStream(const int, const int);
     ~SYCLStream();
 
     virtual void copy() override;