diff --git a/src/VmaUsage.h b/src/VmaUsage.h
index 70c8849..7be6b2c 100644
--- a/src/VmaUsage.h
+++ b/src/VmaUsage.h
@@ -20,6 +20,8 @@ include all public interface declarations. Example:
 
 //#define VMA_HEAVY_ASSERT(expr)
 
+//#define VMA_DEDICATED_ALLOCATION 0
+
 #pragma warning(push, 4)
 #pragma warning(disable: 4127) // conditional expression is constant
 #pragma warning(disable: 4100) // unreferenced formal parameter
diff --git a/src/vk_mem_alloc.h b/src/vk_mem_alloc.h
index 4a37227..fb29a17 100644
--- a/src/vk_mem_alloc.h
+++ b/src/vk_mem_alloc.h
@@ -1077,6 +1077,14 @@ Features deliberately excluded from the scope of this library:
 
 #include <vulkan/vulkan.h>
 
+#if !defined(VMA_DEDICATED_ALLOCATION)
+    #if VK_KHR_get_memory_requirements2 && VK_KHR_dedicated_allocation
+        #define VMA_DEDICATED_ALLOCATION 1
+    #else
+        #define VMA_DEDICATED_ALLOCATION 0
+    #endif
+#endif
+
 /** \struct VmaAllocator
 \brief Represents main object of this library initialized.
 
@@ -1168,8 +1176,10 @@ typedef struct VmaVulkanFunctions {
     PFN_vkDestroyBuffer vkDestroyBuffer;
     PFN_vkCreateImage vkCreateImage;
     PFN_vkDestroyImage vkDestroyImage;
+#if VMA_DEDICATED_ALLOCATION
     PFN_vkGetBufferMemoryRequirements2KHR vkGetBufferMemoryRequirements2KHR;
     PFN_vkGetImageMemoryRequirements2KHR vkGetImageMemoryRequirements2KHR;
+#endif
 } VmaVulkanFunctions;
 
 /// Description of a Allocator to be created.
@@ -7386,7 +7396,14 @@ VmaAllocator_T::VmaAllocator_T(const VmaAllocatorCreateInfo* pCreateInfo) :
     m_CurrentFrameIndex(0),
     m_Pools(VmaStlAllocator<VmaPool>(GetAllocationCallbacks()))
 {
-    VMA_ASSERT(pCreateInfo->physicalDevice && pCreateInfo->device);    
+    VMA_ASSERT(pCreateInfo->physicalDevice && pCreateInfo->device);
+
+#if !(VMA_DEDICATED_ALLOCATION)
+    if((pCreateInfo->flags & VMA_ALLOCATOR_CREATE_KHR_DEDICATED_ALLOCATION_BIT) != 0)
+    {
+        VMA_ASSERT(0 && "VMA_ALLOCATOR_CREATE_KHR_DEDICATED_ALLOCATION_BIT set but required extensions are disabled by preprocessor macros.");
+    }
+#endif
 
     memset(&m_DeviceMemoryCallbacks, 0 ,sizeof(m_DeviceMemoryCallbacks));
     memset(&m_MemProps, 0, sizeof(m_MemProps));
@@ -7477,6 +7494,7 @@ void VmaAllocator_T::ImportVulkanFunctions(const VmaVulkanFunctions* pVulkanFunc
     m_VulkanFunctions.vkDestroyBuffer = &vkDestroyBuffer;
     m_VulkanFunctions.vkCreateImage = &vkCreateImage;
     m_VulkanFunctions.vkDestroyImage = &vkDestroyImage;
+#if VMA_DEDICATED_ALLOCATION
     if(m_UseKhrDedicatedAllocation)
     {
         m_VulkanFunctions.vkGetBufferMemoryRequirements2KHR =
@@ -7484,6 +7502,7 @@ void VmaAllocator_T::ImportVulkanFunctions(const VmaVulkanFunctions* pVulkanFunc
         m_VulkanFunctions.vkGetImageMemoryRequirements2KHR =
             (PFN_vkGetImageMemoryRequirements2KHR)vkGetDeviceProcAddr(m_hDevice, "vkGetImageMemoryRequirements2KHR");
     }
+#endif // #if VMA_DEDICATED_ALLOCATION
 #endif // #if VMA_STATIC_VULKAN_FUNCTIONS == 1
 
 #define VMA_COPY_IF_NOT_NULL(funcName) \
@@ -7505,8 +7524,10 @@ void VmaAllocator_T::ImportVulkanFunctions(const VmaVulkanFunctions* pVulkanFunc
         VMA_COPY_IF_NOT_NULL(vkDestroyBuffer);
         VMA_COPY_IF_NOT_NULL(vkCreateImage);
         VMA_COPY_IF_NOT_NULL(vkDestroyImage);
+#if VMA_DEDICATED_ALLOCATION
         VMA_COPY_IF_NOT_NULL(vkGetBufferMemoryRequirements2KHR);
         VMA_COPY_IF_NOT_NULL(vkGetImageMemoryRequirements2KHR);
+#endif
     }
 
 #undef VMA_COPY_IF_NOT_NULL
@@ -7527,11 +7548,13 @@ void VmaAllocator_T::ImportVulkanFunctions(const VmaVulkanFunctions* pVulkanFunc
     VMA_ASSERT(m_VulkanFunctions.vkDestroyBuffer != VMA_NULL);
     VMA_ASSERT(m_VulkanFunctions.vkCreateImage != VMA_NULL);
     VMA_ASSERT(m_VulkanFunctions.vkDestroyImage != VMA_NULL);
+#if VMA_DEDICATED_ALLOCATION
     if(m_UseKhrDedicatedAllocation)
     {
         VMA_ASSERT(m_VulkanFunctions.vkGetBufferMemoryRequirements2KHR != VMA_NULL);
         VMA_ASSERT(m_VulkanFunctions.vkGetImageMemoryRequirements2KHR != VMA_NULL);
     }
+#endif
 }
 
 VkDeviceSize VmaAllocator_T::CalcPreferredBlockSize(uint32_t memTypeIndex)
@@ -7665,6 +7688,7 @@ VkResult VmaAllocator_T::AllocateDedicatedMemory(
     allocInfo.memoryTypeIndex = memTypeIndex;
     allocInfo.allocationSize = size;
 
+#if VMA_DEDICATED_ALLOCATION
     VkMemoryDedicatedAllocateInfoKHR dedicatedAllocInfo = { VK_STRUCTURE_TYPE_MEMORY_DEDICATED_ALLOCATE_INFO_KHR };
     if(m_UseKhrDedicatedAllocation)
     {
@@ -7680,6 +7704,7 @@ VkResult VmaAllocator_T::AllocateDedicatedMemory(
             allocInfo.pNext = &dedicatedAllocInfo;
         }
     }
+#endif // #if VMA_DEDICATED_ALLOCATION
 
     // Allocate VkDeviceMemory.
     VkDeviceMemory hMemory = VK_NULL_HANDLE;
@@ -7731,6 +7756,7 @@ void VmaAllocator_T::GetBufferMemoryRequirements(
     bool& requiresDedicatedAllocation,
     bool& prefersDedicatedAllocation) const
 {
+#if VMA_DEDICATED_ALLOCATION
     if(m_UseKhrDedicatedAllocation)
     {
         VkBufferMemoryRequirementsInfo2KHR memReqInfo = { VK_STRUCTURE_TYPE_BUFFER_MEMORY_REQUIREMENTS_INFO_2_KHR };
@@ -7748,6 +7774,7 @@ void VmaAllocator_T::GetBufferMemoryRequirements(
         prefersDedicatedAllocation  = (memDedicatedReq.prefersDedicatedAllocation  != VK_FALSE);
     }
     else
+#endif // #if VMA_DEDICATED_ALLOCATION
     {
         (*m_VulkanFunctions.vkGetBufferMemoryRequirements)(m_hDevice, hBuffer, &memReq);
         requiresDedicatedAllocation = false;
@@ -7761,6 +7788,7 @@ void VmaAllocator_T::GetImageMemoryRequirements(
     bool& requiresDedicatedAllocation,
     bool& prefersDedicatedAllocation) const
 {
+#if VMA_DEDICATED_ALLOCATION
     if(m_UseKhrDedicatedAllocation)
     {
         VkImageMemoryRequirementsInfo2KHR memReqInfo = { VK_STRUCTURE_TYPE_IMAGE_MEMORY_REQUIREMENTS_INFO_2_KHR };
@@ -7778,6 +7806,7 @@ void VmaAllocator_T::GetImageMemoryRequirements(
         prefersDedicatedAllocation  = (memDedicatedReq.prefersDedicatedAllocation  != VK_FALSE);
     }
     else
+#endif // #if VMA_DEDICATED_ALLOCATION
     {
         (*m_VulkanFunctions.vkGetImageMemoryRequirements)(m_hDevice, hImage, &memReq);
         requiresDedicatedAllocation = false;