diff --git a/src/wrappers/memory_block.cpp b/src/wrappers/memory_block.cpp
index 9945e17..b10d936 100644
--- a/src/wrappers/memory_block.cpp
+++ b/src/wrappers/memory_block.cpp
@@ -75,7 +75,7 @@ Anvil::MemoryBlock::MemoryBlock(MemoryBlock* parent_memory_block_ptr,
 {
     anvil_assert(parent_memory_block_ptr                                != nullptr);
     anvil_assert(parent_memory_block_ptr->m_gpu_data_ptr                == nullptr);
-    anvil_assert(parent_memory_block_ptr->m_memory                      != nullptr);
+    anvil_assert(parent_memory_block_ptr->m_memory                      != VK_NULL_HANDLE);
     anvil_assert(parent_memory_block_ptr->m_parent_memory_block_ptr     == nullptr);
     anvil_assert(parent_memory_block_ptr->m_start_offset + start_offset <  parent_memory_block_ptr->m_size);
     anvil_assert(size                                                   <= parent_memory_block_ptr->m_size - start_offset - parent_memory_block_ptr->m_start_offset);