diff --git a/gtsam.h b/gtsam.h
index 86e2b961c..f7a8b08e4 100644
--- a/gtsam.h
+++ b/gtsam.h
@@ -1364,13 +1364,13 @@ virtual class ConjugateGradientParameters : gtsam::IterativeOptimizationParamete
   void setReset(size_t value);
   void setEpsilon_rel(double value);
   void setEpsilon_abs(double value);
-  void print(string s);
+  void print();
 };
 
 #include <gtsam/linear/SubgraphSolver.h>
 virtual class SubgraphSolverParameters : gtsam::ConjugateGradientParameters {
   SubgraphSolverParameters();
-  void print(string s) const;
+  void print() const;
 };
 
 class SubgraphSolver  {
diff --git a/gtsam/linear/ConjugateGradientSolver.h b/gtsam/linear/ConjugateGradientSolver.h
index 1f01565ce..d1b3b2c7e 100644
--- a/gtsam/linear/ConjugateGradientSolver.h
+++ b/gtsam/linear/ConjugateGradientSolver.h
@@ -61,14 +61,14 @@ public:
   inline void setEpsilon_rel(double value) { epsilon_rel_ = value; }
   inline void setEpsilon_abs(double value) { epsilon_abs_ = value; }
 
-  virtual void print(const std::string &s="") const {
+  virtual void print() const {
     Base::print();
     std::cout << "ConjugateGradientParameters" << std::endl
-              << "minIter:   " << minIterations_ << std::endl
-              << "maxIter:   " << maxIterations_ << std::endl
-              << "resetIter: " << reset_ << std::endl
-              << "eps_rel:   " << epsilon_rel_ << std::endl
-              << "eps_abs:   " << epsilon_abs_ << std::endl;
+              << "minIter:       " << minIterations_ << std::endl
+              << "maxIter:       " << maxIterations_ << std::endl
+              << "resetIter:     " << reset_ << std::endl
+              << "eps_rel:       " << epsilon_rel_ << std::endl
+              << "eps_abs:       " << epsilon_abs_ << std::endl;
   }
 };
 
diff --git a/gtsam/linear/IterativeSolver.h b/gtsam/linear/IterativeSolver.h
index fb948bf69..81c989840 100644
--- a/gtsam/linear/IterativeSolver.h
+++ b/gtsam/linear/IterativeSolver.h
@@ -48,11 +48,10 @@ namespace gtsam {
     void setKernel(const std::string &s) ;
     void setVerbosity(const std::string &s) ;
 
-    void print() const {
+    virtual void print() const {
       std::cout << "IterativeOptimizationParameters" << std::endl
-                << "kernel:     " << kernelTranslator(kernel_) << std::endl
-                << "verbosity:  " << verbosityTranslator(verbosity_) << std::endl
-                << std::endl;
+                << "kernel:        " << kernelTranslator(kernel_) << std::endl
+                << "verbosity:     " << verbosityTranslator(verbosity_) << std::endl;
     }
 
     static Kernel kernelTranslator(const std::string &s);
diff --git a/gtsam/linear/SubgraphSolver.h b/gtsam/linear/SubgraphSolver.h
index 4df74aa16..889a82862 100644
--- a/gtsam/linear/SubgraphSolver.h
+++ b/gtsam/linear/SubgraphSolver.h
@@ -23,7 +23,7 @@ class SubgraphSolverParameters : public ConjugateGradientParameters {
 public:
   typedef ConjugateGradientParameters Base;
   SubgraphSolverParameters() : Base() {}
-  virtual void print(const std::string &s="") const { Base::print(s); }
+  virtual void print() const { Base::print(); }
 };
 
 /**