diff -up qt3d-opensource-src-5.9.0-beta3/src/3rdparty/assimp/code/glTFAsset.inl.than qt3d-opensource-src-5.9.0-beta3/src/3rdparty/assimp/code/glTFAsset.inl
--- qt3d-opensource-src-5.9.0-beta3/src/3rdparty/assimp/code/glTFAsset.inl.than	2017-05-10 11:48:47.727867274 -0400
+++ qt3d-opensource-src-5.9.0-beta3/src/3rdparty/assimp/code/glTFAsset.inl	2017-05-10 11:48:29.407529841 -0400
@@ -40,6 +40,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 
 #include "StringUtils.h"
 
+using namespace Assimp;
 namespace glTF {
 
 namespace {