diff --git a/vulkan/libvulkan/swapchain.cpp b/vulkan/libvulkan/swapchain.cpp
index 0b9ba05..46a6cfb 100644
--- a/vulkan/libvulkan/swapchain.cpp
+++ b/vulkan/libvulkan/swapchain.cpp
@@ -924,8 +924,7 @@
         // VK_PRESENT_MODE_SHARED_DEMAND_REFRESH_KHR and
         // VK_PRESENT_MODE_SHARED_CONTINUOUS_REFRESH_KHR.  We technically cannot
         // know if VK_PRESENT_MODE_SHARED_MAILBOX_KHR is supported without a
-        // surface, and that cannot be relied upon.
-        present_modes.push_back(VK_PRESENT_MODE_MAILBOX_KHR);
+        // surface, and that cannot be relied upon.  Therefore, don't return it.
         present_modes.push_back(VK_PRESENT_MODE_FIFO_KHR);
     } else {
         ANativeWindow* window = SurfaceFromHandle(surface)->window.get();