diff --git a/gtsam/linear/ConjugateGradientSolver.h b/gtsam/linear/ConjugateGradientSolver.h
index f7f1ad5dc..c31507f9b 100644
--- a/gtsam/linear/ConjugateGradientSolver.h
+++ b/gtsam/linear/ConjugateGradientSolver.h
@@ -37,14 +37,17 @@ struct ConjugateGradientParameters : public IterativeOptimizationParameters {
   } blas_kernel_;
 
   ConjugateGradientParameters()
-  : minIterations_(1), maxIterations_(500), reset_(501), epsilon_rel_(1e-3), epsilon_abs_(1e-3),
-    blas_kernel_(GTSAM) {}
+  : minIterations_(1), maxIterations_(500), reset_(501), epsilon_rel_(1e-3), epsilon_abs_(1e-3), blas_kernel_(GTSAM) {}
 
   ConjugateGradientParameters(size_t minIterations, size_t maxIterations, size_t reset,
     double epsilon_rel, double epsilon_abs, BLASKernel blas = GTSAM)
     : minIterations_(minIterations), maxIterations_(maxIterations), reset_(reset),
       epsilon_rel_(epsilon_rel), epsilon_abs_(epsilon_abs), blas_kernel_(blas) {}
 
+  ConjugateGradientParameters(const ConjugateGradientParameters &p)
+    : minIterations_(p.minIterations_), maxIterations_(p.maxIterations_), reset_(p.reset_),
+      epsilon_rel_(p.epsilon_rel_), epsilon_abs_(p.epsilon_abs_), blas_kernel_(p.blas_kernel_) {}
+
   /* general interface */
   inline size_t minIterations() const { return minIterations_; }
   inline size_t maxIterations() const { return maxIterations_; }
diff --git a/gtsam/linear/IterativeSolver.h b/gtsam/linear/IterativeSolver.h
index fb19e6d58..6f002bda4 100644
--- a/gtsam/linear/IterativeSolver.h
+++ b/gtsam/linear/IterativeSolver.h
@@ -23,15 +23,15 @@ namespace gtsam {
   public:
 
     typedef boost::shared_ptr<IterativeOptimizationParameters> shared_ptr;
-    enum Kernel { CG = 0 } kernel_ ;                                      ///< Iterative Method Kernel
-    enum Verbosity { SILENT = 0, COMPLEXITY = 1, ERROR = 2} verbosity_ ;  ///< Verbosity
+    enum Kernel { CG = 0 } kernel_ ;                                          ///< Iterative Method Kernel
+    enum Verbosity { SILENT, ERROR } verbosity_;
 
   public:
 
     IterativeOptimizationParameters(const IterativeOptimizationParameters &p)
       : kernel_(p.kernel_), verbosity_(p.verbosity_) {}
 
-    IterativeOptimizationParameters(Kernel kernel = CG, Verbosity verbosity = SILENT)
+    IterativeOptimizationParameters(const Kernel kernel = CG, const Verbosity verbosity = SILENT)
       : kernel_(kernel), verbosity_(verbosity) {}
 
     virtual ~IterativeOptimizationParameters() {}