diff --git a/src/vk_mem_alloc.h b/src/vk_mem_alloc.h
index 86e297c..7c160b7 100644
--- a/src/vk_mem_alloc.h
+++ b/src/vk_mem_alloc.h
@@ -3423,7 +3423,7 @@
     It is safe to pass allocations that are in the lost state - they are ignored.
     All allocations not present in this array are considered non-moveable during this defragmentation.
     */
-    VmaAllocation VMA_NOT_NULL * VMA_NOT_NULL VMA_LEN_IF_NOT_NULL(allocationCount) pAllocations;
+    const VmaAllocation VMA_NOT_NULL * VMA_NOT_NULL VMA_LEN_IF_NOT_NULL(allocationCount) pAllocations;
     /** \brief Optional, output. Pointer to array that will be filled with information whether the allocation at certain index has been changed during defragmentation.
 
     The array should have `allocationCount` elements.
@@ -3448,7 +3448,7 @@
     Using this array is equivalent to specifying all allocations from the pools in `pAllocations`.
     It might be more efficient.
     */
-    VmaPool VMA_NOT_NULL * VMA_NULLABLE VMA_LEN_IF_NOT_NULL(poolCount) pPools;
+    const VmaPool VMA_NOT_NULL * VMA_NULLABLE VMA_LEN_IF_NOT_NULL(poolCount) pPools;
     /** \brief Maximum total numbers of bytes that can be copied while moving allocations to different places using transfers on CPU side, like `memcpy()`, `memmove()`.
     
     `VK_WHOLE_SIZE` means no limit.
@@ -3620,7 +3620,7 @@
 */
 VMA_CALL_PRE VkResult VMA_CALL_POST vmaDefragment(
     VmaAllocator VMA_NOT_NULL allocator,
-    VmaAllocation VMA_NOT_NULL * VMA_NOT_NULL VMA_LEN_IF_NOT_NULL(allocationCount) pAllocations,
+    const VmaAllocation VMA_NOT_NULL * VMA_NOT_NULL VMA_LEN_IF_NOT_NULL(allocationCount) pAllocations,
     size_t allocationCount,
     VkBool32* VMA_NULLABLE VMA_LEN_IF_NOT_NULL(allocationCount) pAllocationsChanged,
     const VmaDefragmentationInfo* VMA_NULLABLE pDefragmentationInfo,
@@ -7191,10 +7191,10 @@
         VmaDefragmentationStats* pStats);
     ~VmaDefragmentationContext_T();
 
-    void AddPools(uint32_t poolCount, VmaPool* pPools);
+    void AddPools(uint32_t poolCount, const VmaPool* pPools);
     void AddAllocations(
         uint32_t allocationCount,
-        VmaAllocation* pAllocations,
+        const VmaAllocation* pAllocations,
         VkBool32* pAllocationsChanged);
 
     /*
@@ -14293,7 +14293,7 @@
     }
 }
 
-void VmaDefragmentationContext_T::AddPools(uint32_t poolCount, VmaPool* pPools)
+void VmaDefragmentationContext_T::AddPools(uint32_t poolCount, const VmaPool* pPools)
 {
     for(uint32_t poolIndex = 0; poolIndex < poolCount; ++poolIndex)
     {
@@ -14330,7 +14330,7 @@
 
 void VmaDefragmentationContext_T::AddAllocations(
     uint32_t allocationCount,
-    VmaAllocation* pAllocations,
+    const VmaAllocation* pAllocations,
     VkBool32* pAllocationsChanged)
 {
     // Dispatch pAllocations among defragmentators. Create them when necessary.
@@ -17947,7 +17947,7 @@
 VMA_CALL_PRE void VMA_CALL_POST vmaFreeMemoryPages(
     VmaAllocator allocator,
     size_t allocationCount,
-    VmaAllocation* pAllocations)
+    const VmaAllocation* pAllocations)
 {
     if(allocationCount == 0)
     {
@@ -18166,7 +18166,7 @@
 
 VMA_CALL_PRE VkResult VMA_CALL_POST vmaDefragment(
     VmaAllocator allocator,
-    VmaAllocation* pAllocations,
+    const VmaAllocation* pAllocations,
     size_t allocationCount,
     VkBool32* pAllocationsChanged,
     const VmaDefragmentationInfo *pDefragmentationInfo,