diff --git a/gtsam/base/Matrix.cpp b/gtsam/base/Matrix.cpp
index 75cb8e294..f71f6fce8 100644
--- a/gtsam/base/Matrix.cpp
+++ b/gtsam/base/Matrix.cpp
@@ -35,7 +35,6 @@
 #include <limits>
 #include <iostream>
 #include <iostream>
-#include <vector>
 
 using namespace std;
 
diff --git a/gtsam/base/Matrix.h b/gtsam/base/Matrix.h
index c9625b895..cfedf6d8c 100644
--- a/gtsam/base/Matrix.h
+++ b/gtsam/base/Matrix.h
@@ -28,6 +28,8 @@
 #include <gtsam/base/Vector.h>
 #include <boost/tuple/tuple.hpp>
 
+#include <vector>
+
 /**
  * Matrix is a typedef in the gtsam namespace
  * TODO: make a version to work with matlab wrapping