diff --git a/xml/vk.xml b/xml/vk.xml
index e36e16f1a..1bad3c759 100755
--- a/xml/vk.xml
+++ b/xml/vk.xml
@@ -1030,36 +1030,36 @@ typedef void* <name>MTLSharedEvent_id</name>;
         <type name="VkDefaultVertexAttributeValueKHR" category="enum"/>
 
         <comment>The PFN_vk*Function types are used by VkAllocationCallbacks below</comment>
-        <type category="funcpointer">typedef void (VKAPI_PTR *<name>PFN_vkInternalAllocationNotification</name>)(
+        <type category="funcpointer" requires="void">typedef void (VKAPI_PTR *<name>PFN_vkInternalAllocationNotification</name>)(
     <type>void</type>*                                       pUserData,
     <type>size_t</type>                                      size,
     <type>VkInternalAllocationType</type>                    allocationType,
     <type>VkSystemAllocationScope</type>                     allocationScope);</type>
-        <type category="funcpointer">typedef void (VKAPI_PTR *<name>PFN_vkInternalFreeNotification</name>)(
+        <type category="funcpointer" requires="void">typedef void (VKAPI_PTR *<name>PFN_vkInternalFreeNotification</name>)(
     <type>void</type>*                                       pUserData,
     <type>size_t</type>                                      size,
     <type>VkInternalAllocationType</type>                    allocationType,
     <type>VkSystemAllocationScope</type>                     allocationScope);</type>
-        <type category="funcpointer">typedef void* (VKAPI_PTR *<name>PFN_vkReallocationFunction</name>)(
+        <type category="funcpointer" requires="void">typedef void* (VKAPI_PTR *<name>PFN_vkReallocationFunction</name>)(
     <type>void</type>*                                       pUserData,
     <type>void</type>*                                       pOriginal,
     <type>size_t</type>                                      size,
     <type>size_t</type>                                      alignment,
     <type>VkSystemAllocationScope</type>                     allocationScope);</type>
-        <type category="funcpointer">typedef void* (VKAPI_PTR *<name>PFN_vkAllocationFunction</name>)(
+        <type category="funcpointer" requires="void">typedef void* (VKAPI_PTR *<name>PFN_vkAllocationFunction</name>)(
     <type>void</type>*                                       pUserData,
     <type>size_t</type>                                      size,
     <type>size_t</type>                                      alignment,
     <type>VkSystemAllocationScope</type>                     allocationScope);</type>
-        <type category="funcpointer">typedef void (VKAPI_PTR *<name>PFN_vkFreeFunction</name>)(
+        <type category="funcpointer" requires="void">typedef void (VKAPI_PTR *<name>PFN_vkFreeFunction</name>)(
     <type>void</type>*                                       pUserData,
     <type>void</type>*                                       pMemory);</type>
 
             <comment>The PFN_vkVoidFunction type are used by VkGet*ProcAddr below</comment>
-        <type category="funcpointer">typedef void (VKAPI_PTR *<name>PFN_vkVoidFunction</name>)(void);</type>
+        <type category="funcpointer" requires="void">typedef void (VKAPI_PTR *<name>PFN_vkVoidFunction</name>)(void);</type>
 
             <comment>The PFN_vkDebugReportCallbackEXT type are used by the DEBUG_REPORT extension</comment>
-        <type category="funcpointer">typedef VkBool32 (VKAPI_PTR *<name>PFN_vkDebugReportCallbackEXT</name>)(
+        <type category="funcpointer" requires="VkBool32">typedef VkBool32 (VKAPI_PTR *<name>PFN_vkDebugReportCallbackEXT</name>)(
     <type>VkDebugReportFlagsEXT</type>                       flags,
     <type>VkDebugReportObjectTypeEXT</type>                  objectType,
     <type>uint64_t</type>                                    object,
@@ -1070,20 +1070,20 @@ typedef void* <name>MTLSharedEvent_id</name>;
     <type>void</type>*                                       pUserData);</type>
 
             <comment>The PFN_vkDebugUtilsMessengerCallbackEXT type are used by the VK_EXT_debug_utils extension</comment>
-        <type category="funcpointer" requires="VkDebugUtilsMessengerCallbackDataEXT">typedef VkBool32 (VKAPI_PTR *<name>PFN_vkDebugUtilsMessengerCallbackEXT</name>)(
+        <type category="funcpointer" requires="VkBool32">typedef VkBool32 (VKAPI_PTR *<name>PFN_vkDebugUtilsMessengerCallbackEXT</name>)(
     <type>VkDebugUtilsMessageSeverityFlagBitsEXT</type>           messageSeverity,
     <type>VkDebugUtilsMessageTypeFlagsEXT</type>                  messageTypes,
     const <type>VkDebugUtilsMessengerCallbackDataEXT</type>*      pCallbackData,
     <type>void</type>*                                            pUserData);</type>
 
             <comment>The PFN_vkFaultCallbackFunction type is used by VKSC_VERSION_1_0</comment>
-        <type category="funcpointer">typedef void (VKAPI_PTR *<name>PFN_vkFaultCallbackFunction</name>)(
+        <type category="funcpointer" requires="void">typedef void (VKAPI_PTR *<name>PFN_vkFaultCallbackFunction</name>)(
     <type>VkBool32</type>                                    unrecordedFaults,
     <type>uint32_t</type>                                    faultCount,
     const <type>VkFaultData</type>*                          pFaults);</type>
 
             <comment>The PFN_vkDeviceMemoryReportCallbackEXT type is used by the VK_EXT_device_memory_report extension</comment>
-        <type category="funcpointer" requires="VkDeviceMemoryReportCallbackDataEXT">typedef void (VKAPI_PTR *<name>PFN_vkDeviceMemoryReportCallbackEXT</name>)(
+        <type category="funcpointer" requires="void">typedef void (VKAPI_PTR *<name>PFN_vkDeviceMemoryReportCallbackEXT</name>)(
     const <type>VkDeviceMemoryReportCallbackDataEXT</type>*  pCallbackData,
     <type>void</type>*                                       pUserData);</type>
 
@@ -1093,7 +1093,7 @@ typedef void* <name>MTLSharedEvent_id</name>;
                      equivalent PFN_vkGetInstanceProcAddr type, even though
                      it is implicitly generated in the C header, because
                      that results in multiple definitions.</comment>
-        <type category="funcpointer" requires="VkInstance">typedef PFN_vkVoidFunction (VKAPI_PTR *<name>PFN_vkGetInstanceProcAddrLUNARG</name>)(
+        <type category="funcpointer" requires="PFN_vkVoidFunction">typedef PFN_vkVoidFunction (VKAPI_PTR *<name>PFN_vkGetInstanceProcAddrLUNARG</name>)(
     <type>VkInstance</type> instance, const <type>char</type>* pName);</type>
 
             <comment>Struct types</comment>