diff --git a/Eigen/src/Core/PermutationMatrix.h b/Eigen/src/Core/PermutationMatrix.h
index 1297b8413..6a26af3a5 100644
--- a/Eigen/src/Core/PermutationMatrix.h
+++ b/Eigen/src/Core/PermutationMatrix.h
@@ -532,6 +532,7 @@ namespace internal {
 
 template<typename PermutationType, typename MatrixType, int Side, bool Transposed>
 struct traits<permut_matrix_product_retval<PermutationType, MatrixType, Side, Transposed> >
+  : traits<typename MatrixType::PlainObject>
 {
   typedef typename MatrixType::PlainObject ReturnType;
 };