diff --git a/xml/vk.xml b/xml/vk.xml
index 3eb0fe02..61af494f 100644
--- a/xml/vk.xml
+++ b/xml/vk.xml
@@ -4795,7 +4795,7 @@ server.
         </command>
         <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY,VK_ERROR_DEVICE_LOST">
             <proto><type>VkResult</type> <name>vkQueueWaitIdle</name></proto>
-            <param><type>VkQueue</type> <name>queue</name></param>
+            <param externsync="true"><type>VkQueue</type> <name>queue</name></param>
         </command>
         <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY,VK_ERROR_DEVICE_LOST">
             <proto><type>VkResult</type> <name>vkDeviceWaitIdle</name></proto>