diff --git a/changes/sdk/pr.230.gh.OpenXR-SDK-Source.md b/changes/sdk/pr.230.gh.OpenXR-SDK-Source.md
new file mode 100644
index 000000000..d31688252
--- /dev/null
+++ b/changes/sdk/pr.230.gh.OpenXR-SDK-Source.md
@@ -0,0 +1 @@
+hello_xr: On Vulkan, explicitly add surface extensions for mirror window.
diff --git a/src/tests/hello_xr/graphicsplugin_vulkan.cpp b/src/tests/hello_xr/graphicsplugin_vulkan.cpp
index 506207312..baa2d32d2 100644
--- a/src/tests/hello_xr/graphicsplugin_vulkan.cpp
+++ b/src/tests/hello_xr/graphicsplugin_vulkan.cpp
@@ -1325,6 +1325,15 @@ struct VulkanGraphicsPlugin : public IGraphicsPlugin {
         std::vector<const char*> extensions;
         extensions.push_back("VK_EXT_debug_report");
 
+#if defined(USE_MIRROR_WINDOW)
+#if defined(VK_USE_PLATFORM_WIN32_KHR)
+        extensions.push_back("VK_KHR_surface");
+        extensions.push_back("VK_KHR_win32_surface");
+#else
+#error CreateSurface not supported on this OS
+#endif  // defined(VK_USE_PLATFORM_WIN32_KHR)
+#endif  // defined(USE_MIRROR_WINDOW)
+
         VkApplicationInfo appInfo{VK_STRUCTURE_TYPE_APPLICATION_INFO};
         appInfo.pApplicationName = "hello_xr";
         appInfo.applicationVersion = 1;