diff --git a/wsi/extensions/wsi_extension.hpp b/wsi/extensions/wsi_extension.hpp
index 72d0d7e..afe3732 100644
--- a/wsi/extensions/wsi_extension.hpp
+++ b/wsi/extensions/wsi_extension.hpp
@@ -59,6 +59,8 @@ namespace wsi
 class wsi_ext
 {
 public:
+   virtual ~wsi_ext() = default;
+
    /**
     * @brief Get the name of the extension.
     *
diff --git a/wsi/headless/swapchain.hpp b/wsi/headless/swapchain.hpp
index 61744a3..b6c5eb4 100644
--- a/wsi/headless/swapchain.hpp
+++ b/wsi/headless/swapchain.hpp
@@ -95,7 +95,7 @@ protected:
     *
     * @param image Handle to the image about to be released.
     */
-   void destroy_image(wsi::swapchain_image &image);
+   void destroy_image(wsi::swapchain_image &image) override;
 
    /**
     * @brief Sets the present payload for a swapchain image.