diff --git a/Gems/Atom/RHI/DX12/Code/Source/RHI/Device.cpp b/Gems/Atom/RHI/DX12/Code/Source/RHI/Device.cpp
index 30ed07bd22..371aa20a84 100644
--- a/Gems/Atom/RHI/DX12/Code/Source/RHI/Device.cpp
+++ b/Gems/Atom/RHI/DX12/Code/Source/RHI/Device.cpp
@@ -84,8 +84,8 @@ namespace AZ
                 StagingMemoryAllocator::Descriptor allocatorDesc;
                 allocatorDesc.m_device = this;
 
-                allocatorDesc.m_mediumPageSizeInBytes = platLimitsDesc->m_platformDefaultValues.m_mediumStagingBufferPageSizeInBytes;
-                allocatorDesc.m_largePageSizeInBytes = platLimitsDesc->m_platformDefaultValues.m_largestStagingBufferPageSizeInBytes;
+                allocatorDesc.m_mediumPageSizeInBytes = static_cast<uint32_t>(platLimitsDesc->m_platformDefaultValues.m_mediumStagingBufferPageSizeInBytes);
+                allocatorDesc.m_largePageSizeInBytes = static_cast<uint32_t>(platLimitsDesc->m_platformDefaultValues.m_largestStagingBufferPageSizeInBytes);
                 allocatorDesc.m_collectLatency = m_descriptor.m_frameCountMax;
                 m_stagingMemoryAllocator.Init(allocatorDesc);
             }