diff --git a/library/PolyVoxCore/include/PolyVoxCore/LargeVolume.inl b/library/PolyVoxCore/include/PolyVoxCore/LargeVolume.inl
index 4e679477..54df09c5 100644
--- a/library/PolyVoxCore/include/PolyVoxCore/LargeVolume.inl
+++ b/library/PolyVoxCore/include/PolyVoxCore/LargeVolume.inl
@@ -622,8 +622,8 @@ namespace PolyVox
 	template <typename VoxelType>
 	float LargeVolume<VoxelType>::calculateCompressionRatio(void)
 	{
-		float fRawSize = m_pBlocks.size() * m_uBlockSideLength * m_uBlockSideLength* m_uBlockSideLength * sizeof(VoxelType);
-		float fCompressedSize = calculateSizeInBytes();
+		float fRawSize = static_cast<float>(m_pBlocks.size() * m_uBlockSideLength * m_uBlockSideLength* m_uBlockSideLength * sizeof(VoxelType));
+		float fCompressedSize = static_cast<float>(calculateSizeInBytes());
 		return fCompressedSize/fRawSize;
 	}