diff --git a/Eigen/src/Core/AnyMatrixBase.h b/Eigen/src/Core/AnyMatrixBase.h
index e56b56deb..a5d1cfe9f 100644
--- a/Eigen/src/Core/AnyMatrixBase.h
+++ b/Eigen/src/Core/AnyMatrixBase.h
@@ -61,7 +61,8 @@ template<typename Derived> struct AnyMatrixBase
   {
     // This is the default implementation,
     // derived class can reimplement it in a more optimized way.
-    typename Dest::PlainMatrixType res(*this);
+    typename Dest::PlainMatrixType res(rows(),cols());
+    evalTo(res);
     dst += res;
   }
 
@@ -70,7 +71,8 @@ template<typename Derived> struct AnyMatrixBase
   {
     // This is the default implementation,
     // derived class can reimplement it in a more optimized way.
-    typename Dest::PlainMatrixType res(*this);
+    typename Dest::PlainMatrixType res(rows(),cols());
+    evalTo(res);
     dst -= res;
   }
 
@@ -98,9 +100,9 @@ template<typename Derived> struct AnyMatrixBase
 
 /** \brief Copies the generic expression \a other into *this.
   *
-  * \details The expression must provide a (templated) evalTo(Derived& dst) const 
-  * function which does the actual job. In practice, this allows any user to write 
-  * its own special matrix without having to modify MatrixBase 
+  * \details The expression must provide a (templated) evalTo(Derived& dst) const
+  * function which does the actual job. In practice, this allows any user to write
+  * its own special matrix without having to modify MatrixBase
   *
   * \returns a reference to *this.
   */