diff --git a/backends/imgui_impl_metal.mm b/backends/imgui_impl_metal.mm
index 3ff905a60..1e0c47f52 100644
--- a/backends/imgui_impl_metal.mm
+++ b/backends/imgui_impl_metal.mm
@@ -143,6 +143,7 @@ bool ImGui_ImplMetal_Init(id<MTLDevice> device)
 void ImGui_ImplMetal_Shutdown()
 {
     ImGui_ImplMetal_Data* bd = ImGui_ImplMetal_GetBackendData();
+    IM_UNUSED(bd);
     IM_ASSERT(bd != nullptr && "No renderer backend to shutdown, or already shutdown?");
     ImGui_ImplMetal_DestroyDeviceObjects();
     ImGui_ImplMetal_DestroyBackendData();