diff --git a/gtsam/base/Matrix.cpp b/gtsam/base/Matrix.cpp
index 5b8a021d4..75cb8e294 100644
--- a/gtsam/base/Matrix.cpp
+++ b/gtsam/base/Matrix.cpp
@@ -34,6 +34,8 @@
 #include <fstream>
 #include <limits>
 #include <iostream>
+#include <iostream>
+#include <vector>
 
 using namespace std;