diff --git a/src/CUDAStream.h b/src/CUDAStream.h
index 89ad536..e6505c6 100644
--- a/src/CUDAStream.h
+++ b/src/CUDAStream.h
@@ -26,8 +26,8 @@ class CUDAStream : public Stream<T>
     virtual void mul() override;
     virtual void triad() override;
 
-    void write_arrays(const std::vector<T>& a, const std::vector<T>& b, const std::vector<T>& c);
-    void read_arrays(std::vector<T>& a, std::vector<T>& b, std::vector<T>& c);
+    virtual void write_arrays(const std::vector<T>& a, const std::vector<T>& b, const std::vector<T>& c) override;
+    virtual void read_arrays(std::vector<T>& a, std::vector<T>& b, std::vector<T>& c) override;
 
 };