diff --git a/library/PolyVoxCore/include/PolyVoxCore/Impl/Block.inl b/library/PolyVoxCore/include/PolyVoxCore/Impl/Block.inl
index 3f0829dd..b4abf7d6 100644
--- a/library/PolyVoxCore/include/PolyVoxCore/Impl/Block.inl
+++ b/library/PolyVoxCore/include/PolyVoxCore/Impl/Block.inl
@@ -129,9 +129,6 @@ namespace PolyVox
 		const uint32_t uNoOfVoxels = m_uSideLength * m_uSideLength * m_uSideLength;
 		std::fill(m_tUncompressedData, m_tUncompressedData + uNoOfVoxels, VoxelType());
 		m_bIsUncompressedDataModified = true;
-
-		//For some reason blocks start out compressed. We should probably change this.
-		compress(0);
 	}
 
 	template <typename VoxelType>
@@ -159,8 +156,8 @@ namespace PolyVox
 			uint32_t uDstLength = 1000000;
 
 			//MinizCompressor compressor;
-			RLECompressor<VoxelType, uint16_t> compressor;
-			uint32_t uCompressedLength = compressor.compress(pSrcData, uSrcLength, pDstData, uDstLength);
+			//RLECompressor<VoxelType, uint16_t> compressor;
+			uint32_t uCompressedLength = pCompressor->compress(pSrcData, uSrcLength, pDstData, uDstLength);
 
 			m_pCompressedData = reinterpret_cast<void*>( new uint8_t[uCompressedLength] );
 			memcpy(m_pCompressedData, pDstData, uCompressedLength);
@@ -178,7 +175,7 @@ namespace PolyVox
 	template <typename VoxelType>
 	void Block<VoxelType>::uncompress(Compressor* pCompressor)
 	{
-		//POLYVOX_ASSERT(pCompressor, "Compressor is not valid");
+		POLYVOX_ASSERT(pCompressor, "Compressor is not valid");
 		POLYVOX_ASSERT(m_bIsCompressed == true, "Attempted to uncompress block which is not flagged as compressed.");
 		POLYVOX_ASSERT(m_tUncompressedData == 0, "Uncompressed data already exists.");
 
@@ -190,8 +187,8 @@ namespace PolyVox
 		uint32_t uDstLength = m_uSideLength * m_uSideLength * m_uSideLength * sizeof(VoxelType);
 
 		//MinizCompressor compressor;
-		RLECompressor<VoxelType, uint16_t> compressor;
-		uint32_t uUncompressedLength = compressor.decompress(pSrcData, uSrcLength, pDstData, uDstLength);
+		//RLECompressor<VoxelType, uint16_t> compressor;
+		uint32_t uUncompressedLength = pCompressor->decompress(pSrcData, uSrcLength, pDstData, uDstLength);
 
 		POLYVOX_ASSERT(uUncompressedLength == m_uSideLength * m_uSideLength * m_uSideLength * sizeof(VoxelType), "Destination length has changed.");
 
diff --git a/library/PolyVoxCore/include/PolyVoxCore/LargeVolume.inl b/library/PolyVoxCore/include/PolyVoxCore/LargeVolume.inl
index a048d03c..c3f53407 100644
--- a/library/PolyVoxCore/include/PolyVoxCore/LargeVolume.inl
+++ b/library/PolyVoxCore/include/PolyVoxCore/LargeVolume.inl
@@ -618,6 +618,10 @@ namespace PolyVox
 			
 			// create the new block
 			LoadedBlock newBlock(m_uBlockSideLength);
+
+			//Blocks start out compressed - should we change this?
+			newBlock.block.compress(m_pCompressor);
+
 			itBlock = m_pBlocks.insert(std::make_pair(v3dBlockPos, newBlock)).first;
 
 			//We have created the new block. If paging is enabled it should be used to
diff --git a/library/PolyVoxCore/include/PolyVoxCore/PolyVoxForwardDeclarations.h b/library/PolyVoxCore/include/PolyVoxCore/PolyVoxForwardDeclarations.h
index addaa962..d618bb6e 100644
--- a/library/PolyVoxCore/include/PolyVoxCore/PolyVoxForwardDeclarations.h
+++ b/library/PolyVoxCore/include/PolyVoxCore/PolyVoxForwardDeclarations.h
@@ -60,6 +60,11 @@ namespace PolyVox
 	typedef Array<3,int32_t> Array3DInt32;
 	typedef Array<3,uint32_t> Array3DUint32;
 
+	////////////////////////////////////////////////////////////////////////////////
+	// Compressor
+	////////////////////////////////////////////////////////////////////////////////
+	class Compressor;
+
 	////////////////////////////////////////////////////////////////////////////////
 	// CubicSurfaceExtractor
 	////////////////////////////////////////////////////////////////////////////////
diff --git a/tests/testvolume.cpp b/tests/testvolume.cpp
index cdb9fbf5..5d704760 100644
--- a/tests/testvolume.cpp
+++ b/tests/testvolume.cpp
@@ -25,6 +25,7 @@ freely, subject to the following restrictions:
 
 #include "PolyVoxCore/LargeVolume.h"
 #include "PolyVoxCore/RawVolume.h"
+#include "PolyVoxCore/RLECompressor.h"
 #include "PolyVoxCore/SimpleVolume.h"
 
 #include <QtGlobal>
@@ -269,10 +270,12 @@ TestVolume::TestVolume()
 {
 	Region region(-57, -31, 12, 64, 96, 131); // Deliberatly awkward size
 
+	m_pCompressor = new RLECompressor<int32_t, uint16_t>;
+
 	//Create the volumes
 	m_pRawVolume = new RawVolume<int32_t>(region);
 	m_pSimpleVolume = new SimpleVolume<int32_t>(region);
-	m_pLargeVolume = new LargeVolume<int32_t>(region);
+	m_pLargeVolume = new LargeVolume<int32_t>(region, m_pCompressor);
 
 	// LargeVolume currently fails a test if compression is enabled. It
 	// may be related to accessing the data through more than one sampler?
@@ -299,6 +302,8 @@ TestVolume::~TestVolume()
 	delete m_pRawVolume;
 	delete m_pSimpleVolume;
 	delete m_pLargeVolume;
+
+	delete m_pCompressor;
 }
 
 /*
diff --git a/tests/testvolume.h b/tests/testvolume.h
index 7917f577..59a63ec8 100644
--- a/tests/testvolume.h
+++ b/tests/testvolume.h
@@ -65,6 +65,7 @@ private slots:
 	void testLargeVolumeSamplersWithExternalBackwards();
 
 private:
+	PolyVox::Compressor* m_pCompressor;
 	PolyVox::RawVolume<int32_t>* m_pRawVolume;
 	PolyVox::SimpleVolume<int32_t>* m_pSimpleVolume;
 	PolyVox::LargeVolume<int32_t>* m_pLargeVolume;