diff --git a/include/vulkan/vulkan_handles.hpp b/include/vulkan/vulkan_handles.hpp
index 304e9ed..4fd23cf 100644
--- a/include/vulkan/vulkan_handles.hpp
+++ b/include/vulkan/vulkan_handles.hpp
@@ -2085,6 +2085,8 @@ namespace VULKAN_HPP_NAMESPACE
   class IndirectCommandsLayoutEXT;
   class IndirectExecutionSetEXT;
 
+  typedef void( VKAPI_PTR * PFN_VoidFunction )();
+
 #ifndef VULKAN_HPP_NO_SMART_HANDLE
   //======================
   //=== UNIQUE HANDLEs ===