diff --git a/cpp/include/Image.hpp b/cpp/include/Image.hpp
index 9a4517b..4006c54 100644
--- a/cpp/include/Image.hpp
+++ b/cpp/include/Image.hpp
@@ -52,7 +52,7 @@ class Image {
         /// @brief Saves the image to a file.
         /// Supports the following formats : PNG, BMP, TGA, JPG. The format is determined from the file extension.
         /// @param filename Path to save the image to.
-        Save(std::string const& filename) const;
+        int Save(std::string const& filename) const;
 
         int GetWidth() const;
         int GetHeight() const;