diff --git a/Eigen/src/Core/CommaInitializer.h b/Eigen/src/Core/CommaInitializer.h
index e86f47a..328c558 100644
--- a/Eigen/src/Core/CommaInitializer.h
+++ b/Eigen/src/Core/CommaInitializer.h
@@ -116,6 +116,9 @@
   int m_row;              // current row id
   int m_col;              // current col id
   int m_currentBlockRows; // current block height
+
+private:
+  CommaInitializer& operator=(const CommaInitializer&);
 };
 
 /** \anchor MatrixBaseCommaInitRef
diff --git a/Eigen/src/Core/Cwise.h b/Eigen/src/Core/Cwise.h
index fbf206d..4b14332 100644
--- a/Eigen/src/Core/Cwise.h
+++ b/Eigen/src/Core/Cwise.h
@@ -178,6 +178,9 @@
 
   protected:
     ExpressionTypeNested m_matrix;
+
+  private:
+    Cwise& operator=(const Cwise&);
 };
 
 /** \returns a Cwise wrapper of *this providing additional coefficient-wise operations
diff --git a/Eigen/src/Core/Functors.h b/Eigen/src/Core/Functors.h
index 0c68d74..cbaeb83 100644
--- a/Eigen/src/Core/Functors.h
+++ b/Eigen/src/Core/Functors.h
@@ -351,6 +351,8 @@
   EIGEN_STRONG_INLINE const PacketScalar packetOp(const PacketScalar& a) const
   { return ei_pmul(a, ei_pset1(m_other)); }
   const Scalar m_other;
+private:
+  ei_scalar_multiple_op& operator=(const ei_scalar_multiple_op&);
 };
 template<typename Scalar>
 struct ei_functor_traits<ei_scalar_multiple_op<Scalar> >
@@ -378,6 +380,8 @@
   EIGEN_STRONG_INLINE const PacketScalar packetOp(const PacketScalar& a) const
   { return ei_pmul(a, ei_pset1(m_other)); }
   const Scalar m_other;
+private:
+  ei_scalar_quotient1_impl& operator=(const ei_scalar_quotient1_impl&);
 };
 template<typename Scalar>
 struct ei_functor_traits<ei_scalar_quotient1_impl<Scalar,true> >
@@ -423,6 +427,8 @@
   EIGEN_STRONG_INLINE const Scalar operator() (int, int = 0) const { return m_other; }
   EIGEN_STRONG_INLINE const PacketScalar packetOp() const { return ei_pset1(m_other); }
   const Scalar m_other;
+private:
+  ei_scalar_constant_op& operator=(const ei_scalar_constant_op&);
 };
 template<typename Scalar>
 struct ei_functor_traits<ei_scalar_constant_op<Scalar> >
diff --git a/Eigen/src/Core/NestByValue.h b/Eigen/src/Core/NestByValue.h
index 85a6727..94a8f80 100644
--- a/Eigen/src/Core/NestByValue.h
+++ b/Eigen/src/Core/NestByValue.h
@@ -102,6 +102,9 @@
 
   protected:
     const ExpressionType m_expression;
+
+  private:
+    NestByValue& operator=(const NestByValue&);
 };
 
 /** \returns an expression of the temporary version of *this.
diff --git a/Eigen/src/Core/NoAlias.h b/Eigen/src/Core/NoAlias.h
index 66d8d83..dc32c2f 100644
--- a/Eigen/src/Core/NoAlias.h
+++ b/Eigen/src/Core/NoAlias.h
@@ -73,6 +73,9 @@
 
   protected:
     ExpressionType& m_expression;
+
+  private:
+    NoAlias& operator=(const NoAlias&);
 };
 
 /** \returns a pseudo expression of \c *this with an operator= assuming
diff --git a/Eigen/src/Core/Product.h b/Eigen/src/Core/Product.h
index 7f0c2df..287fc9c 100644
--- a/Eigen/src/Core/Product.h
+++ b/Eigen/src/Core/Product.h
@@ -211,6 +211,9 @@
     {
       ei_outer_product_selector<(int(Dest::Flags)&RowMajorBit) ? RowMajor : ColMajor>::run(*this, dest, alpha);
     }
+
+  private:
+    GeneralProduct& operator=(const GeneralProduct&);
 };
 
 template<> struct ei_outer_product_selector<ColMajor> {
@@ -276,6 +279,9 @@
       ei_gemv_selector<Side,(int(MatrixType::Flags)&RowMajorBit) ? RowMajor : ColMajor,
                        bool(ei_blas_traits<MatrixType>::ActualAccess)>::run(*this, dst, alpha);
     }
+
+private:
+  GeneralProduct& operator=(const GeneralProduct&);
 };
 
 // The vector is on the left => transposition
diff --git a/Eigen/src/Core/ProductBase.h b/Eigen/src/Core/ProductBase.h
index 764dc4d..57183ac 100644
--- a/Eigen/src/Core/ProductBase.h
+++ b/Eigen/src/Core/ProductBase.h
@@ -137,6 +137,8 @@
     void coeffRef(int,int);
     void coeff(int) const;
     void coeffRef(int);
+
+    ProductBase& operator=(const ProductBase&);
 };
 
 template<typename NestedProduct>
diff --git a/Eigen/src/Householder/HouseholderSequence.h b/Eigen/src/Householder/HouseholderSequence.h
index 16e3628..f5a8dd7 100644
--- a/Eigen/src/Householder/HouseholderSequence.h
+++ b/Eigen/src/Householder/HouseholderSequence.h
@@ -153,10 +153,12 @@
     }
 
   protected:
-
     typename VectorsType::Nested m_vectors;
     typename CoeffsType::Nested m_coeffs;
     bool m_trans;
+
+private:
+  HouseholderSequence& operator=(const HouseholderSequence&);
 };
 
 template<typename VectorsType, typename CoeffsType>