diff --git a/Eigen/src/Geometry/Translation.h b/Eigen/src/Geometry/Translation.h
index d76a58f41..7a3482c8c 100644
--- a/Eigen/src/Geometry/Translation.h
+++ b/Eigen/src/Geometry/Translation.h
@@ -53,7 +53,7 @@ public:
   /** corresponding linear transformation matrix type */
   typedef Matrix<Scalar,Dim,Dim> LinearMatrixType;
   /** corresponding affine transformation type */
-  typedef Transform<Scalar,Dim> AffineTransformType;
+  typedef Transform<Scalar,Dim,Affine> AffineTransformType;
 
 protected: