diff --git a/gtsam/nonlinear/NonlinearOptimizer.h b/gtsam/nonlinear/NonlinearOptimizer.h
index 75727e6be..3b088d8a6 100644
--- a/gtsam/nonlinear/NonlinearOptimizer.h
+++ b/gtsam/nonlinear/NonlinearOptimizer.h
@@ -215,6 +215,11 @@ namespace gtsam {
 		 */
 		shared_ordering ordering() const { return ordering_; }
 
+		/**
+		 * Return the parameters
+		 */
+		shared_parameters parameters() const { return parameters_; }
+
 		/**
 		 * Return mean and covariance on a single variable
 		 */