diff --git a/unsupported/Eigen/src/NonLinear/HybridNonLinearSolver.h b/unsupported/Eigen/src/NonLinear/HybridNonLinearSolver.h
index 494d7463f..5e5204ed7 100644
--- a/unsupported/Eigen/src/NonLinear/HybridNonLinearSolver.h
+++ b/unsupported/Eigen/src/NonLinear/HybridNonLinearSolver.h
@@ -114,10 +114,8 @@ HybridNonLinearSolver<FunctorType,Scalar>::solve(
     Parameters parameters;
 
     /* check the input parameters for errors. */
-    if (n <= 0 || tol < 0.) {
-        printf("HybridNonLinearSolver::solve() bad args : n,tol,...");
+    if (n <= 0 || tol < 0.)
         return ImproperInputParameters;
-    }
 
     parameters.maxfev = 100*(n+1);
     parameters.xtol = tol;
@@ -429,10 +427,8 @@ HybridNonLinearSolver<FunctorType,Scalar>::solveNumericalDiff(
     Parameters parameters;
 
     /* check the input parameters for errors. */
-    if (n <= 0 || tol < 0.) {
-        printf("HybridNonLinearSolver::solve() bad args : n,tol,...");
+    if (n <= 0 || tol < 0.)
         return ImproperInputParameters;
-    }
 
     parameters.maxfev = 200*(n+1);
     parameters.xtol = tol;
diff --git a/unsupported/Eigen/src/NonLinear/LevenbergMarquardt.h b/unsupported/Eigen/src/NonLinear/LevenbergMarquardt.h
index 086dd3fbf..bb164bcba 100644
--- a/unsupported/Eigen/src/NonLinear/LevenbergMarquardt.h
+++ b/unsupported/Eigen/src/NonLinear/LevenbergMarquardt.h
@@ -133,10 +133,8 @@ LevenbergMarquardt<FunctorType,Scalar>::minimize(
     Parameters parameters;
 
     /* check the input parameters for errors. */
-    if (n <= 0 || m < n || tol < 0.) {
-        printf("LevenbergMarquardt::minimize() bad args : m,n,tol,...");
+    if (n <= 0 || m < n || tol < 0.)
         return ImproperInputParameters;
-    }
 
     parameters.ftol = tol;
     parameters.xtol = tol;
@@ -420,10 +418,8 @@ LevenbergMarquardt<FunctorType,Scalar>::minimizeNumericalDiff(
     Parameters parameters;
 
     /* check the input parameters for errors. */
-    if (n <= 0 || m < n || tol < 0.) {
-        printf("ei_lmder1 bad args : m,n,tol,...");
+    if (n <= 0 || m < n || tol < 0.)
         return ImproperInputParameters;
-    }
 
     parameters.ftol = tol;
     parameters.xtol = tol;
@@ -708,10 +704,8 @@ LevenbergMarquardt<FunctorType,Scalar>::minimizeOptimumStorage(
     Parameters parameters;
 
     /* check the input parameters for errors. */
-    if (n <= 0 || m < n || tol < 0.) {
-        printf("LevenbergMarquardtOptimumStorage::minimize() bad args : m,n,tol,...");
+    if (n <= 0 || m < n || tol < 0.)
         return ImproperInputParameters;
-    }
 
     parameters.ftol = tol;
     parameters.xtol = tol;