diff --git a/code/AssimpPCH.h b/code/AssimpPCH.h
index c41915e9b..548d13175 100644
--- a/code/AssimpPCH.h
+++ b/code/AssimpPCH.h
@@ -56,7 +56,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Include our stdint.h replacement header for MSVC, take the global header for gcc/mingw
 #if defined( _MSC_VER) && (_MSC_VER < 1600)
-#	include "pstdint.h"
+#	include "../include/assimp/Compiler/pstdint.h"
 #else
 #	include <stdint.h>
 #endif
diff --git a/code/CMakeLists.txt b/code/CMakeLists.txt
index 8dbb0962f..f9a09378e 100644
--- a/code/CMakeLists.txt
+++ b/code/CMakeLists.txt
@@ -10,7 +10,7 @@ SET( HEADER_PATH ../include/assimp )
 SET( COMPILER_HEADERS
 	${HEADER_PATH}/Compiler/pushpack1.h
 	${HEADER_PATH}/Compiler/poppack1.h
-	pstdint.h
+	${HEADER_PATH}/Compiler/pstdint.h
 )
 SOURCE_GROUP( Compiler FILES ${COMPILER_HEADERS})
 
diff --git a/code/pstdint.h b/include/assimp/Compiler/pstdint.h
similarity index 100%
rename from code/pstdint.h
rename to include/assimp/Compiler/pstdint.h
diff --git a/include/assimp/matrix4x4.h b/include/assimp/matrix4x4.h
index 7c6905107..33f5a15b1 100644
--- a/include/assimp/matrix4x4.h
+++ b/include/assimp/matrix4x4.h
@@ -84,8 +84,8 @@ public:
 	 * @param rotation The rotation as a hamilton quaternion 
 	 * @param position The position for the x,y,z axes
 	 */
-	aiMatrix4x4t(aiVector3t<TReal>& scaling, aiQuaterniont<TReal>& rotation,
-		aiVector3t<TReal>& position);
+	aiMatrix4x4t(const aiVector3t<TReal>& scaling, const aiQuaterniont<TReal>& rotation,
+		const aiVector3t<TReal>& position);
 
 public:
 
diff --git a/include/assimp/matrix4x4.inl b/include/assimp/matrix4x4.inl
index 2d30796ab..8cde4773c 100644
--- a/include/assimp/matrix4x4.inl
+++ b/include/assimp/matrix4x4.inl
@@ -109,7 +109,7 @@ inline aiMatrix4x4t<TReal>::aiMatrix4x4t (const aiMatrix3x3t<TReal>& m)
 
 // ----------------------------------------------------------------------------------------
 template <typename TReal>
-inline aiMatrix4x4t<TReal>::aiMatrix4x4t (aiVector3t<TReal>& scaling, aiQuaterniont<TReal>& rotation, aiVector3t<TReal>& position)
+inline aiMatrix4x4t<TReal>::aiMatrix4x4t (const aiVector3t<TReal>& scaling, const aiQuaterniont<TReal>& rotation, const aiVector3t<TReal>& position)
 {
 	// build a 3x3 rotation matrix
 	aiMatrix3x3t<TReal> m = rotation.GetMatrix();
diff --git a/include/assimp/metadata.h b/include/assimp/metadata.h
index 8c8880e81..16809a511 100644
--- a/include/assimp/metadata.h
+++ b/include/assimp/metadata.h
@@ -48,7 +48,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assert.h>
 
 #if defined(_MSC_VER) && (_MSC_VER <= 1500)
-#include "pstdint.h"
+#include "Compiler/pstdint.h"
 #else
 #include <stdint.h>
 #endif