diff --git a/vulkan/libvulkan/driver.h b/vulkan/libvulkan/driver.h
index e058439..5383f59 100644
--- a/vulkan/libvulkan/driver.h
+++ b/vulkan/libvulkan/driver.h
@@ -102,6 +102,7 @@
 
     VkDevice driver_device;
     DeviceDriverTable driver;
+    uint32_t driver_version;
 };
 
 bool Debuggable();