1 files changed, 5 insertions, 2 deletions
diff --git a/Eigen/src/misc/Solve.h b/Eigen/src/misc/Solve.h
index d93869121..75597564b 100644
--- a/Eigen/src/misc/Solve.h
+++ b/Eigen/src/misc/Solve.h
@@ -61,8 +61,11 @@ template<typename _DecompositionType, typename Rhs> struct ei_solve_retval_base
   }
 
   protected:
-  const DecompositionType& m_dec;
-  const typename Rhs::Nested m_rhs;
+    const DecompositionType& m_dec;
+    const typename Rhs::Nested m_rhs;
+
+  private:
+    ei_solve_retval_base& operator=(const ei_solve_retval_base&);
 };
 
 #define EIGEN_MAKE_SOLVE_HELPERS(DecompositionType,Rhs) \