diff --git a/CMakeLists.txt b/CMakeLists.txt
index 55796f80..eed93741 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -6,6 +6,7 @@ SET(SRC_FILES
 	source/IndexedSurfacePatch.cpp
 	source/MarchingCubesTables.cpp
 	source/PolyVoxSceneManager.cpp
+        source/RegionGeometry.cpp  
         source/SurfaceEdge.cpp        
 	source/SurfaceTriangle.cpp
 	source/SurfaceVertex.cpp
diff --git a/include/IndexedSurfacePatch.h b/include/IndexedSurfacePatch.h
index 170617d9..161d5c54 100644
--- a/include/IndexedSurfacePatch.h
+++ b/include/IndexedSurfacePatch.h
@@ -7,6 +7,7 @@
 
 #include "Constants.h"
 #include "ForwardDeclarations.h"
+#include "SurfaceVertex.h"
 #include "TypeDef.h"
 
 namespace PolyVox
diff --git a/include/RegionGeometry.h b/include/RegionGeometry.h
index 94c320eb..6a8f284e 100644
--- a/include/RegionGeometry.h
+++ b/include/RegionGeometry.h
@@ -20,15 +20,16 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 #ifndef __RegionGeometry_H__
 #define __RegionGeometry_H__
 
-#include "IndexedSurfacePatch.h"
+#include "ForwardDeclarations.h"
+#include "TypeDef.h"
 #include "Vector.h"
 
 namespace PolyVox
 {
-	class RegionGeometry
+	class POLYVOX_API RegionGeometry
 	{
 	public:
-		RegionGeometry(){};
+		RegionGeometry();
 
 		bool m_bIsEmpty;
 		bool m_bContainsSingleMaterialPatch;
@@ -38,19 +39,7 @@ namespace PolyVox
 		IndexedSurfacePatch* m_patchSingleMaterial;
 		IndexedSurfacePatch* m_patchMultiMaterial;
 
-		long int getSizeInBytes(void)
-		{
-			long int size = sizeof(RegionGeometry);
-			if(m_patchSingleMaterial)
-			{
-				size += m_patchSingleMaterial->getSizeInBytes();
-			}
-			if(m_patchMultiMaterial)
-			{
-				size += m_patchMultiMaterial->getSizeInBytes();
-			}
-			return size;
-		}
+		long int getSizeInBytes(void);
 
 	};	
 }
diff --git a/source/IndexedSurfacePatch.cpp b/source/IndexedSurfacePatch.cpp
index 8b9caa41..0386e9d3 100644
--- a/source/IndexedSurfacePatch.cpp
+++ b/source/IndexedSurfacePatch.cpp
@@ -1,6 +1,5 @@
 #include "IndexedSurfacePatch.h"
 #include "SurfaceTypes.h"
-#include "SurfaceVertex.h"
 
 using namespace boost;
 
diff --git a/source/RegionGeometry.cpp b/source/RegionGeometry.cpp
new file mode 100644
index 00000000..a7e507cc
--- /dev/null
+++ b/source/RegionGeometry.cpp
@@ -0,0 +1,24 @@
+#include "IndexedSurfacePatch.h"
+#include "RegionGeometry.h"
+
+namespace PolyVox
+{
+
+	RegionGeometry::RegionGeometry()
+	{
+	}
+
+	long int RegionGeometry::getSizeInBytes(void)
+		{
+			long int size = sizeof(RegionGeometry);
+			if(m_patchSingleMaterial)
+			{
+				size += m_patchSingleMaterial->getSizeInBytes();
+			}
+			if(m_patchMultiMaterial)
+			{
+				size += m_patchMultiMaterial->getSizeInBytes();
+			}
+			return size;
+		}
+}
\ No newline at end of file