diff --git a/src/intel/vulkan/anv_device.c b/src/intel/vulkan/anv_device.c
index d594df7..e3d278d 100644
--- a/src/intel/vulkan/anv_device.c
+++ b/src/intel/vulkan/anv_device.c
@@ -1246,11 +1246,8 @@
 
    assert(pAllocateInfo->sType == VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO);
 
-   if (pAllocateInfo->allocationSize == 0) {
-      /* Apparently, this is allowed */
-      *pMem = VK_NULL_HANDLE;
-      return VK_SUCCESS;
-   }
+   /* The Vulkan 1.0.33 spec says "allocationSize must be greater than 0". */
+   assert(pAllocateInfo->allocationSize > 0);
 
    /* We support exactly one memory heap. */
    assert(pAllocateInfo->memoryTypeIndex == 0 ||