diff --git a/include/igl/dqs.cpp b/include/igl/dqs.cpp
index aab3c6532..56090ef47 100644
--- a/include/igl/dqs.cpp
+++ b/include/igl/dqs.cpp
@@ -1,9 +1,9 @@
 // This file is part of libigl, a simple c++ geometry processing library.
-// 
+//
 // Copyright (C) 2014 Alec Jacobson <alecjacobson@gmail.com>
-// 
-// This Source Code Form is subject to the terms of the Mozilla Public License 
-// v. 2.0. If a copy of the MPL was not distributed with this file, You can 
+//
+// This Source Code Form is subject to the terms of the Mozilla Public License
+// v. 2.0. If a copy of the MPL was not distributed with this file, You can
 // obtain one at http://mozilla.org/MPL/2.0/.
 #include "dqs.h"
 #include <Eigen/Geometry>
@@ -15,8 +15,8 @@ template <
   typename T,
   typename DerivedU>
 IGL_INLINE void igl::dqs(
-  const Eigen::PlainObjectBase<DerivedV> & V,
-  const Eigen::PlainObjectBase<DerivedW> & W,
+  const Eigen::MatrixBase<DerivedV> & V,
+  const Eigen::MatrixBase<DerivedW> & W,
   const std::vector<Q,QAlloc> & vQ,
   const std::vector<T> & vT,
   Eigen::PlainObjectBase<DerivedU> & U)
@@ -70,5 +70,5 @@ IGL_INLINE void igl::dqs(
 
 #ifdef IGL_STATIC_LIBRARY
 // Explicit template instantiation
-template void igl::dqs<Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Quaternion<double, 0>, Eigen::aligned_allocator<Eigen::Quaternion<double, 0> >, Eigen::Matrix<double, 3, 1, 0, 3, 1>, Eigen::Matrix<double, -1, -1, 0, -1, -1> >(Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> > const&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> > const&, std::vector<Eigen::Quaternion<double, 0>, Eigen::aligned_allocator<Eigen::Quaternion<double, 0> > > const&, std::vector<Eigen::Matrix<double, 3, 1, 0, 3, 1>, std::allocator<Eigen::Matrix<double, 3, 1, 0, 3, 1> > > const&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> >&);
+template void igl::dqs<Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Quaternion<double, 0>, Eigen::aligned_allocator<Eigen::Quaternion<double, 0> >, Eigen::Matrix<double, 3, 1, 0, 3, 1>, Eigen::Matrix<double, -1, -1, 0, -1, -1> >(Eigen::MatrixBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> > const&, Eigen::MatrixBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> > const&, std::vector<Eigen::Quaternion<double, 0>, Eigen::aligned_allocator<Eigen::Quaternion<double, 0> > > const&, std::vector<Eigen::Matrix<double, 3, 1, 0, 3, 1>, std::allocator<Eigen::Matrix<double, 3, 1, 0, 3, 1> > > const&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> >&);
 #endif
diff --git a/include/igl/dqs.h b/include/igl/dqs.h
index 9b53ae1c7..288d308fd 100644
--- a/include/igl/dqs.h
+++ b/include/igl/dqs.h
@@ -1,9 +1,9 @@
 // This file is part of libigl, a simple c++ geometry processing library.
-// 
+//
 // Copyright (C) 2014 Alec Jacobson <alecjacobson@gmail.com>
-// 
-// This Source Code Form is subject to the terms of the Mozilla Public License 
-// v. 2.0. If a copy of the MPL was not distributed with this file, You can 
+//
+// This Source Code Form is subject to the terms of the Mozilla Public License
+// v. 2.0. If a copy of the MPL was not distributed with this file, You can
 // obtain one at http://mozilla.org/MPL/2.0/.
 #ifndef IGL_DQS_H
 #define IGL_DQS_H
@@ -17,7 +17,7 @@ namespace igl
   // Inputs:
   //   V  #V by 3 list of rest positions
   //   W  #W by #C list of weights
-  //   vQ  #C list of rotation quaternions 
+  //   vQ  #C list of rotation quaternions
   //   vT  #C list of translation vectors
   // Outputs:
   //   U  #V by 3 list of new positions
@@ -29,8 +29,8 @@ namespace igl
     typename T,
     typename DerivedU>
   IGL_INLINE void dqs(
-    const Eigen::PlainObjectBase<DerivedV> & V,
-    const Eigen::PlainObjectBase<DerivedW> & W,
+    const Eigen::MatrixBase<DerivedV> & V,
+    const Eigen::MatrixBase<DerivedW> & W,
     const std::vector<Q,QAlloc> & vQ,
     const std::vector<T> & vT,
     Eigen::PlainObjectBase<DerivedU> & U);