diff --git a/Setup/mock_include/vulkan/vulkan.h b/Setup/mock_include/vulkan/vulkan.h
index b2ef5f2..49e6a9f 100644
--- a/Setup/mock_include/vulkan/vulkan.h
+++ b/Setup/mock_include/vulkan/vulkan.h
@@ -1,9 +1,7 @@
 #define VK_VERSION_1_0
-typedef void PFN_vkGetInstanceProcAddr;
-typedef void VkInstance;
-typedef void VkInstance;
-typedef void VkPhysicalDevice;
-typedef void VkResult;
-typedef void VkInstance;
-typedef void VkAllocationCallbacks;
-typedef void VkSurfaceKHR;
+typedef void* PFN_vkGetInstanceProcAddr;
+typedef void* VkInstance;
+typedef void* VkPhysicalDevice;
+typedef int VkResult;
+typedef struct VkAllocationCallbacks VkAllocationCallbacks;
+typedef unsigned long long VkSurfaceKHR;
diff --git a/src/Glfw.bf b/src/Glfw.bf
index b7e9e18..6994593 100644
--- a/src/Glfw.bf
+++ b/src/Glfw.bf
@@ -2431,7 +2431,7 @@ public function void Joystickfun(c_int jid, c_int event);
  *
  *  @ingroup init
  */
-[LinkName("glfwInitVulkanLoader")] public static extern void InitVulkanLoader(c_int loader);
+[LinkName("glfwInitVulkanLoader")] public static extern void InitVulkanLoader(PFN_vkGetInstanceProcAddr loader);
 
 /*VK_VERSION_1_0*/
 
@@ -6496,7 +6496,7 @@ public function void Joystickfun(c_int jid, c_int event);
  *
  *  @ingroup vulkan
  */
-[LinkName("glfwGetInstanceProcAddress")] public static extern Vkproc GetInstanceProcAddress(c_int instance, c_char* procname);
+[LinkName("glfwGetInstanceProcAddress")] public static extern Vkproc GetInstanceProcAddress(VkInstance instance, c_char* procname);
 
 /*! @brief Returns whether the specified queue family can present images.
  *
@@ -6533,7 +6533,7 @@ public function void Joystickfun(c_int jid, c_int event);
  *
  *  @ingroup vulkan
  */
-[LinkName("glfwGetPhysicalDevicePresentationSupport")] public static extern Bool GetPhysicalDevicePresentationSupport(c_int instance, c_int device, uint32 queuefamily);
+[LinkName("glfwGetPhysicalDevicePresentationSupport")] public static extern Bool GetPhysicalDevicePresentationSupport(VkInstance instance, VkPhysicalDevice device, uint32 queuefamily);
 
 /*! @brief Creates a Vulkan surface for the specified window.
  *
@@ -6603,7 +6603,7 @@ public function void Joystickfun(c_int jid, c_int event);
  *
  *  @ingroup vulkan
  */
-[LinkName("glfwCreateWindowSurface")] public static extern VkResult CreateWindowSurface(c_int instance, Window* window, VkAllocationCallbacks* allocator, out VkSurfaceKHR surface);
+[LinkName("glfwCreateWindowSurface")] public static extern VkResult CreateWindowSurface(VkInstance instance, Window* window, VkAllocationCallbacks* allocator, out VkSurfaceKHR surface);
 }
 
 static