diff --git a/library/PolyVoxCore/include/MeshDecimator.inl b/library/PolyVoxCore/include/MeshDecimator.inl
index 3936b047..248edfc5 100644
--- a/library/PolyVoxCore/include/MeshDecimator.inl
+++ b/library/PolyVoxCore/include/MeshDecimator.inl
@@ -21,6 +21,8 @@ freely, subject to the following restrictions:
     distribution.
 *******************************************************************************/
 
+#include "SurfaceMesh.h"
+
 namespace PolyVox
 {
 	////////////////////////////////////////////////////////////////////////////////
@@ -344,4 +346,4 @@ namespace PolyVox
 
 		return result;
 	}
-}
\ No newline at end of file
+}