diff --git a/src/virtio/vulkan/vn_common.c b/src/virtio/vulkan/vn_common.c
index 9d6be361b57..91ba2f6e9c2 100644
--- a/src/virtio/vulkan/vn_common.c
+++ b/src/virtio/vulkan/vn_common.c
@@ -17,12 +17,6 @@
 #include "util/os_misc.h"
 #include "vk_enum_to_str.h"
 
-#if __STDC_VERSION__ >= 201112L
-#define VN_MAX_ALIGN _Alignof(max_align_t)
-#else
-#define VN_MAX_ALIGN VN_DEFAULT_ALIGN
-#endif
-
 static const struct debug_control vn_debug_options[] = {
    { "init", VN_DEBUG_INIT },
    { "result", VN_DEBUG_RESULT },
@@ -67,44 +61,6 @@ vn_log_result(struct vn_instance *instance,
    return result;
 }
 
-static void *
-vn_default_alloc(void *pUserData,
-                 size_t size,
-                 size_t alignment,
-                 VkSystemAllocationScope allocationScope)
-{
-   assert(VN_MAX_ALIGN % alignment == 0);
-   return malloc(size);
-}
-
-static void *
-vn_default_realloc(void *pUserData,
-                   void *pOriginal,
-                   size_t size,
-                   size_t alignment,
-                   VkSystemAllocationScope allocationScope)
-{
-   assert(VN_MAX_ALIGN % alignment == 0);
-   return realloc(pOriginal, size);
-}
-
-static void
-vn_default_free(void *pUserData, void *pMemory)
-{
-   free(pMemory);
-}
-
-const VkAllocationCallbacks *
-vn_default_allocator(void)
-{
-   static const VkAllocationCallbacks allocator = {
-      .pfnAllocation = vn_default_alloc,
-      .pfnReallocation = vn_default_realloc,
-      .pfnFree = vn_default_free,
-   };
-   return &allocator;
-}
-
 void
 vn_relax(uint32_t *iter)
 {
diff --git a/src/virtio/vulkan/vn_common.h b/src/virtio/vulkan/vn_common.h
index b0a33f1a7ba..80780efccc2 100644
--- a/src/virtio/vulkan/vn_common.h
+++ b/src/virtio/vulkan/vn_common.h
@@ -132,9 +132,6 @@ vn_log_result(struct vn_instance *instance,
               VkResult result,
               const char *where);
 
-const VkAllocationCallbacks *
-vn_default_allocator(void);
-
 void
 vn_relax(uint32_t *iter);
 
diff --git a/src/virtio/vulkan/vn_device.c b/src/virtio/vulkan/vn_device.c
index 804e88a1f86..e1a9c053773 100644
--- a/src/virtio/vulkan/vn_device.c
+++ b/src/virtio/vulkan/vn_device.c
@@ -1853,7 +1853,7 @@ vn_CreateInstance(const VkInstanceCreateInfo *pCreateInfo,
                   VkInstance *pInstance)
 {
    const VkAllocationCallbacks *alloc =
-      pAllocator ? pAllocator : vn_default_allocator();
+      pAllocator ? pAllocator : vk_default_allocator();
    struct vn_instance *instance;
    VkResult result;