diff --git a/include/vkd3d.h b/include/vkd3d.h
index 32e81234..99a62220 100644
--- a/include/vkd3d.h
+++ b/include/vkd3d.h
@@ -77,6 +77,8 @@ struct vkd3d_device_create_info
 #define VKD3D_RESOURCE_INITIAL_STATE_TRANSITION 0x00000001
 #define VKD3D_RESOURCE_SWAPCHAIN_IMAGE          0x00000002
 
+#ifndef VKD3D_NO_PROTOTYPES
+
 HRESULT vkd3d_create_instance(const struct vkd3d_instance_create_info *create_info,
         struct vkd3d_instance **instance);
 ULONG vkd3d_instance_decref(struct vkd3d_instance *instance);
@@ -99,7 +101,7 @@ HRESULT vkd3d_create_image_resource(ID3D12Device *device, const D3D12_RESOURCE_D
 ULONG vkd3d_resource_decref(ID3D12Resource *resource);
 ULONG vkd3d_resource_incref(ID3D12Resource *resource);
 
-HRESULT vkd3d_serialize_root_signature(const D3D12_ROOT_SIGNATURE_DESC *root_signature_desc,
+HRESULT vkd3d_serialize_root_signature(const D3D12_ROOT_SIGNATURE_DESC *desc,
         D3D_ROOT_SIGNATURE_VERSION version, ID3DBlob **blob, ID3DBlob **error_blob);
 
 HRESULT vkd3d_create_root_signature_deserializer(const void *data, SIZE_T data_size,
@@ -107,6 +109,41 @@ HRESULT vkd3d_create_root_signature_deserializer(const void *data, SIZE_T data_s
 
 VkFormat vkd3d_get_vk_format(DXGI_FORMAT format);
 
+#endif  /* VKD3D_NO_PROTOTYPES */
+
+/*
+ * Function pointer typedefs for vkd3d functions.
+ */
+typedef HRESULT (*vkd3d_create_instance_pfn)(const struct vkd3d_instance_create_info *create_info,
+        struct vkd3d_instance **instance);
+typedef ULONG (*vkd3d_instance_decref_pfn)(struct vkd3d_instance *instance);
+typedef VkInstance (*vkd3d_instance_get_vk_instance_pfn)(struct vkd3d_instance *instance);
+typedef ULONG (*vkd3d_instance_incref_pfn)(struct vkd3d_instance *instance);
+
+typedef HRESULT (*vkd3d_create_device_pfn)(const struct vkd3d_device_create_info *create_info,
+        REFIID iid, void **device);
+typedef IUnknown * (*vkd3d_get_device_parent_pfn)(ID3D12Device *device);
+typedef VkDevice (*vkd3d_get_vk_device_pfn)(ID3D12Device *device);
+typedef VkPhysicalDevice (*vkd3d_get_vk_physical_device_pfn)(ID3D12Device *device);
+typedef struct vkd3d_instance * (*vkd3d_instance_from_device_pfn)(ID3D12Device *device);
+
+typedef uint32_t (*vkd3d_get_vk_queue_family_index_pfn)(ID3D12CommandQueue *queue);
+typedef VkQueue (*vkd3d_acquire_vk_queue_pfn)(ID3D12CommandQueue *queue);
+typedef void (*vkd3d_release_vk_queue_pfn)(ID3D12CommandQueue *queue);
+
+typedef HRESULT (*vkd3d_create_image_resource_pfn)(ID3D12Device *device, const D3D12_RESOURCE_DESC *desc,
+        VkImage vk_image, unsigned int resource_flags, ID3D12Resource **resource);
+typedef ULONG (*vkd3d_resource_decref_pfn)(ID3D12Resource *resource);
+typedef ULONG (*vkd3d_resource_incref_pfn)(ID3D12Resource *resource);
+
+typedef HRESULT (*vkd3d_serialize_root_signature_pfn)(const D3D12_ROOT_SIGNATURE_DESC *desc,
+        D3D_ROOT_SIGNATURE_VERSION version, ID3DBlob **blob, ID3DBlob **error_blob);
+
+typedef HRESULT (*vkd3d_create_root_signature_deserializer_pfn)(const void *data, SIZE_T data_size,
+        REFIID iid, void **deserializer);
+
+typedef VkFormat (*vkd3d_get_vk_format_pfn)(DXGI_FORMAT format);
+
 #ifdef __cplusplus
 }
 #endif  /* __cplusplus */