diff --git a/vulkan/api/vulkan.api b/vulkan/api/vulkan.api
index df45c20..1023182 100644
--- a/vulkan/api/vulkan.api
+++ b/vulkan/api/vulkan.api
@@ -150,6 +150,9 @@
 @extension("VK_NVX_device_generated_commands") define VK_NVX_DEVICE_GENERATED_COMMANDS_SPEC_VERSION 1
 @extension("VK_NVX_device_generated_commands") define VK_NVX_DEVICE_GENERATED_COMMANDS_EXTENSION_NAME "VK_NVX_device_generated_commands"
 
+@extension("VK_KHR_swapchain_front_buffered") define VK_KHR_SWAPCHAIN_FRONT_BUFFERED_SPEC_VERSION 2
+@extension("VK_KHR_swapchain_front_buffered") define VK_KHR_SWAPCHAIN_FRONT_BUFFERED_EXTENSION_NAME "VK_KHR_swapchain_front_buffered"
+
 
 
 /////////////
@@ -924,6 +927,10 @@
     VK_PRESENT_MODE_MAILBOX_KHR                             = 0x00000001,
     VK_PRESENT_MODE_FIFO_KHR                                = 0x00000002,
     VK_PRESENT_MODE_FIFO_RELAXED_KHR                        = 0x00000003,
+    //@extension("VK_KHR_swapchain_front_buffered")
+    VK_PRESENT_MODE_FRONT_BUFFERED_DEMAND_REFRESH_KHR       = 1000111000,
+    //@extension("VK_KHR_swapchain_front_buffered")
+    VK_PRESENT_MODE_FRONT_BUFFERED_CONTINUOUS_REFRESH_KHR   = 1000111001,
 }
 
 @extension("VK_KHR_surface")
@@ -6109,6 +6116,13 @@
         VkDeviceGeneratedCommandsLimitsNVX*         pLimits) {
 }
 
+@extension("VK_KHR_swapchain_front_buffered")
+cmd VkResult vkGetSwapchainStatusKHR(
+        VkDevice                                    device,
+        VkSwapchainKHR                              swapchain) {
+    return ?
+}
+
 
 ////////////////
 // Validation //
diff --git a/vulkan/include/vulkan/vulkan.h b/vulkan/include/vulkan/vulkan.h
index 6ddce8f..28c2440 100644
--- a/vulkan/include/vulkan/vulkan.h
+++ b/vulkan/include/vulkan/vulkan.h
@@ -3228,6 +3228,8 @@
     VK_PRESENT_MODE_MAILBOX_KHR = 1,
     VK_PRESENT_MODE_FIFO_KHR = 2,
     VK_PRESENT_MODE_FIFO_RELAXED_KHR = 3,
+    VK_PRESENT_MODE_FRONT_BUFFERED_DEMAND_REFRESH_KHR = 1000111000,
+    VK_PRESENT_MODE_FRONT_BUFFERED_CONTINUOUS_REFRESH_KHR = 1000111001,
     VK_PRESENT_MODE_BEGIN_RANGE_KHR = VK_PRESENT_MODE_IMMEDIATE_KHR,
     VK_PRESENT_MODE_END_RANGE_KHR = VK_PRESENT_MODE_FIFO_RELAXED_KHR,
     VK_PRESENT_MODE_RANGE_SIZE_KHR = (VK_PRESENT_MODE_FIFO_RELAXED_KHR - VK_PRESENT_MODE_IMMEDIATE_KHR + 1),
@@ -3884,6 +3886,18 @@
     const VkPresentRegionKHR* pRegions;
 } VkPresentRegionsKHR;
 
+#define VK_KHR_swapchain_front_buffered 1
+#define VK_KHR_SWAPCHAIN_FRONT_BUFFERED_SPEC_VERSION 2
+#define VK_KHR_SWAPCHAIN_FRONT_BUFFERED_EXTENSION_NAME "VK_KHR_swapchain_front_buffered"
+
+typedef VkResult (VKAPI_PTR *PFN_vkGetSwapchainStatusKHR)(VkDevice device, VkSwapchainKHR swapchain);
+
+#ifndef VK_NO_PROTOTYPES
+VKAPI_ATTR VkResult VKAPI_CALL vkGetSwapchainStatusKHR(
+    VkDevice                                    device,
+    VkSwapchainKHR                              swapchain);
+#endif
+
 #define VK_EXT_debug_report 1
 VK_DEFINE_NON_DISPATCHABLE_HANDLE(VkDebugReportCallbackEXT)