1 files changed, 6 insertions, 3 deletions
diff --git a/Eigen/src/misc/Image.h b/Eigen/src/misc/Image.h
index 9ed5d5f70..05ffa667c 100644
--- a/Eigen/src/misc/Image.h
+++ b/Eigen/src/misc/Image.h
@@ -67,9 +67,12 @@ template<typename _DecompositionType> struct ei_image_retval_base
   }
 
   protected:
-  const DecompositionType& m_dec;
-  int m_rank, m_cols;
-  const MatrixType& m_originalMatrix;
+    const DecompositionType& m_dec;
+    int m_rank, m_cols;
+    const MatrixType& m_originalMatrix;
+
+  private:
+    ei_image_retval_base& operator=(const ei_image_retval_base&);
 };
 
 #define EIGEN_MAKE_IMAGE_HELPERS(DecompositionType) \