diff --git a/gtsam/geometry/SO3.h b/gtsam/geometry/SO3.h
index 2b84dafba..eb6129ac8 100644
--- a/gtsam/geometry/SO3.h
+++ b/gtsam/geometry/SO3.h
@@ -26,7 +26,6 @@
 #include <gtsam/base/Matrix.h>
 
 #include <cmath>
-#include <iosfwd>
 #include <vector>
 
 namespace gtsam {
diff --git a/gtsam/geometry/SO4.h b/gtsam/geometry/SO4.h
index 0cc3bb9fe..c8e85b63f 100644
--- a/gtsam/geometry/SO4.h
+++ b/gtsam/geometry/SO4.h
@@ -28,7 +28,6 @@
 
 #include <boost/random/mersenne_twister.hpp>
 
-#include <iosfwd>
 #include <string>
 
 namespace gtsam {
diff --git a/gtsam/geometry/SOn.h b/gtsam/geometry/SOn.h
index eea24f1a8..529bcc1bd 100644
--- a/gtsam/geometry/SOn.h
+++ b/gtsam/geometry/SOn.h
@@ -25,7 +25,6 @@
 #include <Eigen/Core>
 #include <boost/random.hpp>
 
-#include <iostream>
 #include <string>
 #include <vector>
 
diff --git a/gtsam/linear/tests/testGaussianBayesTree.cpp b/gtsam/linear/tests/testGaussianBayesTree.cpp
index ca3ebf91c..17dc6a425 100644
--- a/gtsam/linear/tests/testGaussianBayesTree.cpp
+++ b/gtsam/linear/tests/testGaussianBayesTree.cpp
@@ -25,7 +25,6 @@ using namespace boost::assign;
 
 #include <gtsam/base/debug.h>
 #include <gtsam/base/numericalDerivative.h>
-#include <gtsam/geometry/Rot2.h>
 #include <gtsam/linear/GaussianJunctionTree.h>
 #include <gtsam/linear/GaussianBayesTree.h>
 #include <gtsam/linear/GaussianConditional.h>