diff --git a/gtsam/nonlinear/lago.cpp b/gtsam/nonlinear/lago.cpp
index 4f838ca96..792dad80c 100644
--- a/gtsam/nonlinear/lago.cpp
+++ b/gtsam/nonlinear/lago.cpp
@@ -19,6 +19,7 @@
 #include <gtsam/nonlinear/lago.h>
 #include <gtsam/slam/PriorFactor.h>
 #include <gtsam/slam/BetweenFactor.h>
+#include <gtsam/inference/Symbol.h>
 #include <gtsam/geometry/Pose2.h>
 
 #include <boost/math/special_functions.hpp>
diff --git a/gtsam/nonlinear/lago.h b/gtsam/nonlinear/lago.h
index 094b4325d..8c8ef9a73 100644
--- a/gtsam/nonlinear/lago.h
+++ b/gtsam/nonlinear/lago.h
@@ -34,7 +34,6 @@
 
 #pragma once
 
-#include <gtsam/nonlinear/Symbol.h>
 #include <gtsam/nonlinear/NonlinearFactorGraph.h>
 #include <gtsam/linear/GaussianFactorGraph.h>
 #include <gtsam/linear/VectorValues.h>
diff --git a/gtsam/nonlinear/tests/testLago.cpp b/gtsam/nonlinear/tests/testLago.cpp
index 4b116a108..f2cab4506 100644
--- a/gtsam/nonlinear/tests/testLago.cpp
+++ b/gtsam/nonlinear/tests/testLago.cpp
@@ -19,20 +19,14 @@
  *  @date   May 14, 2014
  */
 
-#include <gtsam/geometry/Pose2.h>
-
+#include <gtsam/nonlinear/lago.h>
+#include <gtsam/slam/dataset.h>
+#include <gtsam/slam/BetweenFactor.h>
+#include <gtsam/slam/PriorFactor.h>
 #include <gtsam/inference/Symbol.h>
 
-#include <gtsam/slam/dataset.h>
-#include <gtsam/slam/PriorFactor.h>
-#include <gtsam/slam/BetweenFactor.h>
-
-#include <gtsam/nonlinear/NonlinearFactorGraph.h>
-#include <gtsam/nonlinear/lago.h>
-
-#include <gtsam/base/TestableAssertions.h>
 #include <CppUnitLite/TestHarness.h>
-#include <boost/math/constants/constants.hpp>
+
 #include <cmath>
 
 using namespace std;