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-rw-r--r--Eigen/src/Geometry/Quaternion.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/Eigen/src/Geometry/Quaternion.h b/Eigen/src/Geometry/Quaternion.h
index 67319d15b..e0dfadd7c 100644
--- a/Eigen/src/Geometry/Quaternion.h
+++ b/Eigen/src/Geometry/Quaternion.h
@@ -211,6 +211,7 @@ public:
template<typename _Scalar>
struct ei_traits<Quaternion<_Scalar> >
{
+ typedef Quaternion<_Scalar> PlainObject;
typedef _Scalar Scalar;
typedef Matrix<_Scalar,4,1> Coefficients;
enum{